Demons, Sunday School. A worried Mary sends Sheldon to Sunday school after she finds him playing Dungeons & Dragons with Tam and Billy.

A Computer, A Plastic Pony. Sheldon asking for a computer has unforeseen consequences for his parents, prompting Mary and the twins to move in with Meemaw.

A Sneeze, Detention. Sheldon's germophobia lands him in detention when flu season hits Medford and he takes extreme measures to remain healthy.

The Work Song Nanocluster. Penny's business selling hair accessories out of her apartment gets out of hand when an over-caffeinated Sheldon takes charge.

The Dead Hooker Juxtaposition. Penny feels threatened when another sexy woman moves into the apartment building and angered when she senses the guys are being taken advantage of.

The Hofstadter Isotope. A fellow comic book enthusiast's hitting on Penny leads to Leonard, Raj and Howard going to a bar's Ladies' Night.

Penny's.

Classified Material Turbulence. Stuart asks Leonard's advice for a date with Penny. Wolowitz realises there's an error in a toilet he designed for the International Space Station.

The Monopolar Expedition. The guys receive a prestigious offer to work over the summer at the North Pole, and Penny's resultant behaviour leaves Leonard unsure if he should go.

The Electric Can Opener. Discovering Leonard, Raj and Howard fudged the results of his Arctic research expedition, a disgraced Sheldon heads home to Texas.

The Jiminy Conjecture. Sheldon and Howard wager comic books over a cricket's species. Meanwhile, a less-than-perfect romantic night agonizes Leonard and Penny.

The Gothowitz Deviation. Howard takes Raj along to check out the Goth dating scene. Sheldon uses chocolate as part of a behaviour modification experiment on Penny.

The Pirate Solution. Facing a return to India, Raj needs a job desperately enough to consider working for Sheldon. Howard becomes a third wheel to Leonard and Penny.

Creepy Candy Coating Corollary. Sheldon looks forward to squaring off against a Star Trek actor in a fantasy card game tournament. Wolowitz cashes in on an old pact with Leonard.

The Cornhusker Vortex. Hoping to fit in with Penny's football-loving friends, Leonard gets tutored in the sport by Sheldon. Raj is furious over the loss of his patang.

The Guitarist Amplification. Leonard and Penny's first big fight sees Sheldon playing mediator due to childhood trauma that means he can't be around loud verbal conflicts.

The Vengeance Formulation. Barry Kripke pranks Sheldon during his spot on NPR, leaving him wanting vengeance. Bernadette pressures Wolowitz to define their relationship.

The Gorilla Experiment. Penny seeks Sheldon's help to better comprehend Leonard's physics work. Wolowitz sees green when Leonard invites Bernadette to watch an experiment.

The Maternal Congruence. A Christmas visit from his mother has Leonard discovering she's kept a lot of news from him that she shares with Sheldon.

The Psychic Vortex. Leonard is aghast to find out that Penny believes in psychics. Sheldon tries to assist Koothrappali in picking up a girl at a university party.

The Bozeman Reaction. A robbery of their apartment sees Leonard and Sheldon call on their friends to devise a security system.

The Einstein Approximation. Stuck on the solution to a physics problem, Sheldon tries different methods to change his thinking, including working at The Cheesecake Factory.

The Large Hadron Collision. When Leonard is offered a trip to Switzerland on Valentine's Day to see a particle accelerator, he must choose between taking Penny or Sheldon.

A Pregnancy Test. Georgie's jealousy rears its head when Mandy gets sent on an overnight work trip with boss, who also happens to be her ex.

Refuge Of The Downtrodden. Georgie, Mandy, and the family do their best to lift Connor's spirits during a rough patch while Connor tries to figure out a plan for his life.

Albania. Roisin and Sara adventure across Albania, from target practice in the city to an Elvis taxi to the coast and suspicious yoghurt drinks in the country.

When the President's friend is murdered, CIA agent Jack Ryan takes on a Colombian drug cartel, only to discover corruption within his own government.

Albania. Roisin and Sara adventure across Albania, from target practice in the city to an Elvis taxi to the coast and suspicious yoghurt drinks in the country.

Potato Salad, A Broomstick. When Mary takes a job at the church, Sheldon and Missy are left home alone for the very first time.

Lindsey's Story. Lindsey seemed to have it all - but her food addiction threatens to ruin everything. As she starts her weight loss journey, is her husband a support or an addict?

This Is Your Day. War veteran and bride-to-be Alicia has served in both Iraq and Afghanistan. Randy wants to give back to her by surprising Alicia with a VIP day at Kleinfeld.

I'm A Legacy. Joelle tries on her mother's 1987 dress - but is she ready to walk down the aisle 80s style? Bride LeAnne, a Kleinfeld legacy, declares she's the ultimate anti-bride.

You Are A Daredevil! Paralympian Amy Purdy isn't afraid to take risks, like waiting to find her dress just three weeks before the big day. Plus, Lori's wedding is in nine days.

Teleshopping.

Teleshopping.

The World According To Peggy. When Peggy suddenly announces she's leaving her job, Molly scrambles to throw her a retirement party, but wonders just why Peggy is calling it quits.

Buy The Book. It's an exciting new chapter in Molly's life as her book is finally released, but she soon becomes obsessively worried that no one will buy it.

What Ever Happened To Baby Peggy? Peggy's past proves to be fertile ground for Molly's second book, but the author discovers it's quite a chore to get her mother-in-law to fess up.

A Computer, A Plastic Pony. Sheldon asking for a computer has unforeseen consequences for his parents, prompting Mary and the twins to move in with Meemaw.

A Sneeze, Detention. Sheldon's germophobia lands him in detention when flu season hits Medford and he takes extreme measures to remain healthy.

Potato Salad, A Broomstick. When Mary takes a job at the church, Sheldon and Missy are left home alone for the very first time.

The Vengeance Formulation. Barry Kripke pranks Sheldon during his spot on NPR, leaving him wanting vengeance. Bernadette pressures Wolowitz to define their relationship.

The Gorilla Experiment. Penny seeks Sheldon's help to better comprehend Leonard's physics work. Wolowitz sees green when Leonard invites Bernadette to watch an experiment.

The Maternal Congruence. A Christmas visit from his mother has Leonard discovering she's kept a lot of news from him that she shares with Sheldon.

The Psychic Vortex. Leonard is aghast to find out that Penny believes in psychics. Sheldon tries to assist Koothrappali in picking up a girl at a university party.

The Bozeman Reaction. A robbery of their apartment sees Leonard and Sheldon call on their friends to devise a security system.

The Einstein Approximation. Stuck on the solution to a physics problem, Sheldon tries different methods to change his thinking, including working at The Cheesecake Factory.

The Large Hadron Collision. When Leonard is offered a trip to Switzerland on Valentine's Day to see a particle accelerator, he must choose between taking Penny or Sheldon.

The Excelsior Acquisition. An appearance in traffic court comes at the worst possible time for Sheldon, the same day Stan Lee is appearing at the comic book store.

Pie Fight. When Mike hits a personal best weight-loss goal, he makes the risky decision to indulge in a slice of pie.

Cocktails And Calamine. Molly is nervous about Mike attending a celebratory party her publisher puts on for her and Peggy.

Mudlick Or Bust. Molly surprises Peggy by reuniting her with her estranged sister, Rosemary, when they take a road trip to Peggy's hometown of Mudlick.

Dolomite, Apple Slices. Sheldon makes a new friend who introduces him to a new field of science, while his parents disagree on how to handle Sheldon's blossoming social life.

Killer Asteroids, Oklahoma. A disappointing loss at the science fair sparks an existential crisis and sends Sheldon's life in a new direction.

Jiu-Jitsu, Bubble Wrap. When Sheldon is bullied by an unlikely character, Mary and George disagree on how to handle the situation.

The Precious Fragmentation. The guys go to a garage sale and find a ring from the Lord of the Rings films, and the rare find threatens their friendship.

The Pants Alternative. Sheldon's fear of speaking in front of large groups threatens his ability to accept an award, so the gang tries to help him prepare for the big night.

The Wheaton Recurrence. Sheldon squares off at the bowling alley against nemesis Wil Wheaton. Leonard's miffed over Penny's response when he says, 'I love you.'.

The Spaghetti Catalysis. Following Leonard and Penny's break up, Sheldon tries to hide from Leonard and the gang that he had a friendly spaghetti dinner at Penny's.

The Plimpton Stimulation. Sheldon hosts a visiting female physicist, but her intelligence seems matched by her libido.

The Staircase Implementation. A squabble over the thermostat setting leads to Leonard going over to Penny's and recounting the story of how he met and moved in with Sheldon.

The Lunar Excitation. Howard and Raj set Sheldon up on an Internet dating site. Penny discovers that she can't go back to dating dumb jocks after dating Leonard.

The Robotic Manipulation. Howard uses a robotic arm for his own pleasure. Sheldon goes on a date with Amy Farrah Fowler, and Penny finds herself accompanying them.

Dara Ó Briain hosts topical chat and hilarious games with guests Rhys James, Hugh Dennis, Katherine Ryan, Sara Pascoe, Glenn Moore and Sarah Keyworth.

Albania. Roisin and Sara adventure across Albania, from target practice in the city to an Elvis taxi to the coast and suspicious yoghurt drinks in the country.

The Incredible Shrinking Lipoma. Gerald returns to see Dr. Lee and a hand specialist about a huge, intrusive bump on his finger. Vinnie has an embarrassing birthmark on his neck.

Scaly Mermaid Skin. Natasha's massive ear keloids are keeping her from pursuing her modelling dreams. Eight-year-old Wynter wants her scaly mermaid skin cured.

Tales From The Cyst. Nhan has an extremely red birthmark that covers half of his face. Debbie worries that her shoulder lump will prematurely age her.

Bethany's Story. Addiction counsellor Bethany has gotten so big that she can no longer work. Now she risks losing her life if Dr. Now can't help her curb her own addiction.

Not Afraid To Try New Things. A team of specialists guide brides through the process of selecting, fitting, altering and delivering each flawless dress in time for the perfect day.

I'm A Firm Believer In Signs. Bride Jenna is joined by her NFL player brother, Justin Pugh. Talmesha wants a gown that compliments a very special bouquet honouring her late father.

Randy, I Think I Got This. While new consultant Shay is excited to help with a surprise marriage proposal, former Miss USA Nia Sanchez has just one day to find her gown.

That Looks Like A Torture Device. Bridget's feelings about the perfect dress for her wedding to pro snowboarder Scott Lago get turned upside-down by her opinionated entourage.

Teleshopping.

Teleshopping.

Pie Fight. When Mike hits a personal best weight-loss goal, he makes the risky decision to indulge in a slice of pie.

Cocktails And Calamine. Molly is nervous about Mike attending a celebratory party her publisher puts on for her and Peggy.

Mudlick Or Bust. Molly surprises Peggy by reuniting her with her estranged sister, Rosemary, when they take a road trip to Peggy's hometown of Mudlick.

Dolomite, Apple Slices. Sheldon makes a new friend who introduces him to a new field of science, while his parents disagree on how to handle Sheldon's blossoming social life.

Killer Asteroids, Oklahoma. A disappointing loss at the science fair sparks an existential crisis and sends Sheldon's life in a new direction.

Jiu-Jitsu, Bubble Wrap. When Sheldon is bullied by an unlikely character, Mary and George disagree on how to handle the situation.

The Precious Fragmentation. The guys go to a garage sale and find a ring from the Lord of the Rings films, and the rare find threatens their friendship.

The Pants Alternative. Sheldon's fear of speaking in front of large groups threatens his ability to accept an award, so the gang tries to help him prepare for the big night.

The Wheaton Recurrence. Sheldon squares off at the bowling alley against nemesis Wil Wheaton. Leonard's miffed over Penny's response when he says, 'I love you.'.

The Spaghetti Catalysis. Following Leonard and Penny's break up, Sheldon tries to hide from Leonard and the gang that he had a friendly spaghetti dinner at Penny's.

The Plimpton Stimulation. Sheldon hosts a visiting female physicist, but her intelligence seems matched by her libido.

The Staircase Implementation. A squabble over the thermostat setting leads to Leonard going over to Penny's and recounting the story of how he met and moved in with Sheldon.

The Lunar Excitation. Howard and Raj set Sheldon up on an Internet dating site. Penny discovers that she can't go back to dating dumb jocks after dating Leonard.

The Robotic Manipulation. Howard uses a robotic arm for his own pleasure. Sheldon goes on a date with Amy Farrah Fowler, and Penny finds herself accompanying them.

No Kay Morale. When Peggy's depressed friend Kay returns to town, Molly is determined to find a way to lift her spirits.

Mother From Another Mudlick. Mike meets his Aunt Rosemary for the first time and is instantly smitten by her warmth and positive attitude, which is the opposite of his mother.

Fight To The Finish. When Molly gets angry with Mike for not listening to her vent about writing with Peggy, they go their separate ways for a day.

A Mother, A Child. When Mary bans Sheldon from reading a mature comic book, Sheldon decides it's time to assert his independence from his mother.

Gluons, Guacamole. When Sheldon is no longer academically challenged at Medford High, he audits a college class taught by a professor.

A Dog, A Squirrel. A heated argument erupts between the Coopers and their neighbours when a new dog terrorises Sheldon.

Cruciferous Veg Amplification. Sheldon calculates that he'll be dead before technology exists to download his consciousness into a robot, so he goes on a healthy-living binge.

The Zazzy Substitution. Sheldon breaks up with Amy Farrah Fowler, and the guys worry when he starts replacing her with cats.

The Hot Troll Deviation. Wolowitz is embarrassed when a secret of his is revealed, and Sheldon and Raj battle at work.

The Desperation Emanation. Sheldon meets Amy's mum and comes to the realisation he no longer wants to see Amy, and Leonard realises everyone is in a relationship except for him.

The Irish Pub Formulation. When Raj's sister has a one-day layover, he forbids the others from hooking up with her, unaware she and Leonard already did long ago.

The Apology Insufficiency. The rest of the gang is interviewed by the FBI for Wolowitz's security clearance, with Sheldon accidentally letting slip some damaging information.

The 21-Second Excitation. The guys camp out to see a print of Raiders of the Lost Ark with 21 extra seconds and are outraged to see Wil Wheaton and his friends skip the line.

The Boyfriend Complexity. Penny asks Leonard to lie to her visiting father, while Howard, Raj and Bernadette spend all night looking through a telescope.

We Used To Be Lovers. Kody travels to North Carolina to meet with Janelle and apologize, but she questions his motives. Christine tells David about Kody's request to meet.

What If We Worked This Out? Kody is nervous about his second apology as he meets up with Christine and David. Janelle's friends ask her if she would ever get back with Kody.

Don't Sweat It! Audrey pops the painful bumps on her body so she can feel relief. Krista's excessive sweating is so severe that she could fill up an entire milk jug with her sweat.

Crazy, Stupid, Lump. Jess is looking for love but has a giant bump on his neck. Former NFL defensive tackle, Marcell Dareus, hopes Dr. Lee can tackle his forehead lipoma.

California Bumpin'. Brent has a tricep bump that could be intertwined in his muscle. Plus, Jeb avoids the beach because of the massive number of bumps all over his body.

J.T.'s Story. J.T. is almost 900-lbs with a 100-lb lymphedema mass on his leg and a dangerous food addiction. When his girlfriend takes him to Houston, his behaviour drives her away.

There's A New Guy In Town. Kleinfeld hired its first male consultant! Bride Tolu contends with her opinionated sister, and Amanda needs a modest dress for her orthodox wedding.

The Male Perspective. Country music star Kristian Bush joins his friends to find Evyn's perfect dress for her wedding. Melanie is nervous her dress won't fit her plus size frame.

Breaking the Bank. Alexis has searched everywhere for a certain gown, only to now find it's double her budget. Jenna's dream dress turns into a nightmare.

Worth The Wait. Eternal bridesmaid Brittany, now the bride, wants to 'drop it low' in a dress! Erika plans to wear her old wedding dress down the aisle - with a different fiancé!

Teleshopping.

Teleshopping.

No Kay Morale. When Peggy's depressed friend Kay returns to town, Molly is determined to find a way to lift her spirits.

Mother From Another Mudlick. Mike meets his Aunt Rosemary for the first time and is instantly smitten by her warmth and positive attitude, which is the opposite of his mother.

Fight To The Finish. When Molly gets angry with Mike for not listening to her vent about writing with Peggy, they go their separate ways for a day.

A Mother, A Child. When Mary bans Sheldon from reading a mature comic book, Sheldon decides it's time to assert his independence from his mother.

Gluons, Guacamole. When Sheldon is no longer academically challenged at Medford High, he audits a college class taught by a professor.

A Dog, A Squirrel. A heated argument erupts between the Coopers and their neighbours when a new dog terrorises Sheldon.

Cruciferous Veg Amplification. Sheldon calculates that he'll be dead before technology exists to download his consciousness into a robot, so he goes on a healthy-living binge.

The Zazzy Substitution. Sheldon breaks up with Amy Farrah Fowler, and the guys worry when he starts replacing her with cats.

The Hot Troll Deviation. Wolowitz is embarrassed when a secret of his is revealed, and Sheldon and Raj battle at work.

The Desperation Emanation. Sheldon meets Amy's mum and comes to the realisation he no longer wants to see Amy, and Leonard realises everyone is in a relationship except for him.

The Irish Pub Formulation. When Raj's sister has a one-day layover, he forbids the others from hooking up with her, unaware she and Leonard already did long ago.

The Apology Insufficiency. The rest of the gang is interviewed by the FBI for Wolowitz's security clearance, with Sheldon accidentally letting slip some damaging information.

The 21-Second Excitation. The guys camp out to see a print of Raiders of the Lost Ark with 21 extra seconds and are outraged to see Wil Wheaton and his friends skip the line.

The Boyfriend Complexity. Penny asks Leonard to lie to her visiting father, while Howard, Raj and Bernadette spend all night looking through a telescope.

Near Death Do Us Part. After Carl has a near-death experience while on duty, he tells Mike he's going to propose to Victoria. But can Mike keep a secret?

The Bitter Man And The Sea. Mike and Molly are forced to 'uninvite' Carl to their anniversary cruise following his nasty breakup with Victoria.

Cops On The Rocks. Mike and Carl decide to go to couples counselling to try and reconcile their partnership. Plus, Molly decides to do a promotional radio interview.

Summer Sausage, Pocket Poncho. While Sheldon is obsesses over Meemaw's budding relationship with his mentor, Dr. Sturgis, George and Mary attempt to bond with their other kids.

Ice Cream, Gentlemen Callers. When Meemaw is pursued by two gentlemen callers, Sheldon interferes, forcing her to set some ground rules.

A High-Pitched Buzz. Sheldon dismantles the refrigerator to stop an annoying hum and then must get a paper route to pay for the repairs.

The Alien Parasite Hypothesis. Amy crushes on one of Penny's dim ex-boyfriends, Zack. Raj and Wolowitz argue over who'd be the better superhero.

Justice League Recombination. The guys get Zack and Penny to join their Justice League costume for a New Year's Eve bash at the comic book store.

The Bus Pants Utilization. Their friendship becomes strained when Sheldon tries to take over Leonard's creation of a smartphone application that solves differential equations.

The Love Car Displacement. Howard is jealous when Bernadette runs into her old boyfriend at a science event they're attending.

The Thespian Catalyst. Sheldon wants acting lessons from Penny, hoping they will make him a better teacher.

The Benefactor Factor. After meeting at a fundraising gala, an aged but wealthy Caltech donor makes Leonard ponder if he's willing to have sex with her to secure a donation.

The Cohabitation Formulation. Howard contemplates a serious decision in his relationship with Bernadette, and Leonard and Raj's sister start seeing each other again.

The Toast Derivation. Sheldon is in a crisis when he realises he's not the epicentre of the group, so he decides to find new friends.

Bye Bye Booty Bump. John would love to date but is embarrassed about a huge bump on his cheek. Denise sees Dr. Lee about a growth on her booty.

Hex Marks The Spot. Dr. Lee removes a painful bump from Christian's back, all while his stuffed animal companion watches. Plus, Soniya suffers from dark spots.

A Lipoma Is Born. Barbara's back lump became more noticeable after she lost 131 pounds. Hilda's depression is a result of the multitude of bumps on her eyelids.

Quadripple Nipple. Don has a case of crippling psoriasis that has completely taken over his body. Jeff has a huge growth over his spine that looks like a hunchback.

Dr. Pimple Popper. Angelina's huge chest lump affects her love life and Delano has a football-sized mass on his back. Plus, Carla hopes to get painful cysts removed from her scalp.

Gina's Story. Gina and wife Beth live with Gina's mum but it's not a happy family. With Gina's weight problem spiralling, she must go to Houston to get Dr. Now's help.

Agree To Disagree. Bride Francesca returns for a second visit, but will her picky entourage let her choose? Brittany wants a non-traditional gown, but her mum is not on board.

Vision Confusion. Lauren wants to look like a 'classy porn star' at her wedding, but she is in for a surprise. Bride Cheryl is racked with indecision over her gown.

Booby Trap. Danielle's size thirty-four, J-cup chest is blowing her budget sky high. Stephanie wants to show off the goods but her mother certainly does not.

A Situation In The Salon. Mike Sorrentino arrives at Kleinfeld to help Melissa find her wedding gown. However, Mike and his brothers steal the spotlight.

Teleshopping.

Teleshopping.

Near Death Do Us Part. After Carl has a near-death experience while on duty, he tells Mike he's going to propose to Victoria. But can Mike keep a secret?

The Bitter Man And The Sea. Mike and Molly are forced to 'uninvite' Carl to their anniversary cruise following his nasty breakup with Victoria.

Cops On The Rocks. Mike and Carl decide to go to couples counselling to try and reconcile their partnership. Plus, Molly decides to do a promotional radio interview.

Summer Sausage, Pocket Poncho. While Sheldon is obsesses over Meemaw's budding relationship with his mentor, Dr. Sturgis, George and Mary attempt to bond with their other kids.

Ice Cream, Gentlemen Callers. When Meemaw is pursued by two gentlemen callers, Sheldon interferes, forcing her to set some ground rules.

A High-Pitched Buzz. Sheldon dismantles the refrigerator to stop an annoying hum and then must get a paper route to pay for the repairs.

The Alien Parasite Hypothesis. Amy crushes on one of Penny's dim ex-boyfriends, Zack. Raj and Wolowitz argue over who'd be the better superhero.

Justice League Recombination. The guys get Zack and Penny to join their Justice League costume for a New Year's Eve bash at the comic book store.

The Bus Pants Utilization. Their friendship becomes strained when Sheldon tries to take over Leonard's creation of a smartphone application that solves differential equations.

The Love Car Displacement. Howard is jealous when Bernadette runs into her old boyfriend at a science event they're attending.

The Thespian Catalyst. Sheldon wants acting lessons from Penny, hoping they will make him a better teacher.

The Benefactor Factor. After meeting at a fundraising gala, an aged but wealthy Caltech donor makes Leonard ponder if he's willing to have sex with her to secure a donation.

The Cohabitation Formulation. Howard contemplates a serious decision in his relationship with Bernadette, and Leonard and Raj's sister start seeing each other again.

The Toast Derivation. Sheldon is in a crisis when he realises he's not the epicentre of the group, so he decides to find new friends.

One Small Step For Mike. Molly has high hopes that a fitness tracking device will encourage Mike to be more active. But Mike has other plans for it.

Peg O' My Heart Attack. After Peg suffers a heart attack after a heated argument with Molly, Mike blames his wife, who immediately sets out to make amends.

Super Cop. Mike becomes hyper-vigilant after his wallet is stolen from the squad car while taking a nap.

A Rival Prodigy. When Dr. Sturgis bonds with Paige, another 10-year-old genius, Sheldon gets jealous. Meanwhile, Mary invites Paige's family over for a play date.

A Crisis Of Faith. When Mary's faith is shaken by a tragedy in the community, Sheldon becomes an unlikely ally.

A Financial Secret. When George Sr. asks Sheldon to keep a secret from Mary, the stress of not being honest drives Sheldon to hide out at Tam's for his first sleepover.

The Prestidigitation Approximation. Leonard has a tough choice to make when Priya asks him to stop spending time with Penny, and Howard keeps pestering Sheldon with a magic trick.

The Zarnecki Incursion. The guys become sleuths to find out who hacked Sheldon's online-game account.

The Herb Garden Germination. Sheldon and Amy decide to start rumours about themselves as a social test. Howard takes his relationship with Bernadette to an even higher level.

The Agreement Dissection. Priya uses her legal expertise to rip apart Sheldon's roommate agreement, and the women take the flustered Sheldon out dancing.

The Wildebeest Implementation. Raj makes an attempt to cure his phobia of talking to women, and Penny spies on Leonard and Priya with the help of Bernadette.

The Engagement Reaction. Mrs. Wolowitz ends up in the hospital after Howard tells her he's marrying Bernadette. While there, Leonard stresses over Penny and Priya.

The Roommate Transmogrification. Mrs. Wolowitz ends up in the hospital after Howard tells her he's marrying Bernadette. While there, Leonard stresses over Penny and Priya.

The Skank Reflex Analysis. Penny worries that she's screwed things up permanently with her friends after her night with Raj, while Sheldon takes command of the paintball team.

When the President's friend is murdered, CIA agent Jack Ryan takes on a Colombian drug cartel, only to discover corruption within his own government.

Needle Little Help. Firefighter Jimmy has numerous torso bumps that make it painful to play with his young son. Plus, Steven has a mystery bump on the back of his head.

Bye Bye Booty Bump. John would love to date but is embarrassed about a huge bump on his cheek. Denise sees Dr. Lee about a growth on her booty.

Travis's Story. When musician Travis got too big to walk down the aisle, he promised his wife a proper wedding one day. Since then he's only gained weight. Can Dr. Now help him?

Daddy Dearest. Emily and her very opinionated father want the perfect princess ball gown for her big day. Melissa worries her conservative dad will not like her custom Pnina gown.

Please Love My Dress. Eccentric Marlene wants a feathered or black ball gown, but her parents prefer something traditional. Jessica loves every dress, but her family likes none.

Love At First Sight. HuffPost Live correspondent and host, Caitlyn Becker, is torn between two dresses. Candace declares the first gown she wears is her dream dress.

Case Of Dress Distress. Jamie is devastated when she falls in love with an over-budget gown. Plus, Natalie has trouble committing to a dress in the absence of her ill mother.

Teleshopping.

Teleshopping.

One Small Step For Mike. Molly has high hopes that a fitness tracking device will encourage Mike to be more active. But Mike has other plans for it.

Peg O' My Heart Attack. After Peg suffers a heart attack after a heated argument with Molly, Mike blames his wife, who immediately sets out to make amends.

Super Cop. Mike becomes hyper-vigilant after his wallet is stolen from the squad car while taking a nap.

A Rival Prodigy. When Dr. Sturgis bonds with Paige, another 10-year-old genius, Sheldon gets jealous. Meanwhile, Mary invites Paige's family over for a play date.

A Crisis Of Faith. When Mary's faith is shaken by a tragedy in the community, Sheldon becomes an unlikely ally.

A Financial Secret. When George Sr. asks Sheldon to keep a secret from Mary, the stress of not being honest drives Sheldon to hide out at Tam's for his first sleepover.

The Prestidigitation Approximation. Leonard has a tough choice to make when Priya asks him to stop spending time with Penny, and Howard keeps pestering Sheldon with a magic trick.

The Zarnecki Incursion. The guys become sleuths to find out who hacked Sheldon's online-game account.

The Herb Garden Germination. Sheldon and Amy decide to start rumours about themselves as a social test. Howard takes his relationship with Bernadette to an even higher level.

The Agreement Dissection. Priya uses her legal expertise to rip apart Sheldon's roommate agreement, and the women take the flustered Sheldon out dancing.

The Wildebeest Implementation. Raj makes an attempt to cure his phobia of talking to women, and Penny spies on Leonard and Priya with the help of Bernadette.

The Engagement Reaction. Mrs. Wolowitz ends up in the hospital after Howard tells her he's marrying Bernadette. While there, Leonard stresses over Penny and Priya.

The Roommate Transmogrification. Mrs. Wolowitz ends up in the hospital after Howard tells her he's marrying Bernadette. While there, Leonard stresses over Penny and Priya.

The Skank Reflex Analysis. Penny worries that she's screwed things up permanently with her friends after her night with Raj, while Sheldon takes command of the paintball team.

Joyce's Will Be Done. Molly is shocked when Joyce reveals she's leaving the house to Victoria in her will.

The Good Wife. Molly's leisure activities between novels become an issue for Mike. Tensions rise as he wants her to be the perfect homemaker.

Weekend With Birdie. Mike is excited to bring a new stray dog into the home. But Molly isn't so sure and has trouble warming up to the new family member.

A Research Study. Dr. Sturgis recommends Sheldon and Missy for a university research study on twins, and Mary is unhappy when the test results go to Sheldon's head.

Seven Deadly Sins. Mary clashes with Sheldon's drama teacher Mr. Lundy over plans for a Halloween haunted house fundraiser for the church.

Carbon Dating, Stuffed Raccoon. Sheldon gets into trouble with fellow child genius Paige at the Science Museum, while George Sr. is forced to play therapist to Paige's parents.

The Pulled Groin Extrapolation. Leonard and Amy get to know each other better at a co-worker's wedding. Howard and Bernadette spend the weekend with Mrs. Wolowitz!

The Wiggly Finger Catalyst. Raj is upset he's the only one of the four guys who's not in a relationship, so Penny sets out to find the perfect date.

Russian Rocket Reaction, The. Sheldon and Leonard get invited to a housewarming party at Wil Wheaton's house. Howard gets an out-of-this-world opportunity!

The Rhinitis Revelation. Craving a little motherly love, Sheldon competes with the gang for his mother's attention when she comes to visit.

The Good Guy Fluctuation. A cute comic book artist tests Leonard's relationship with Priya, while Sheldon, getting into the Halloween spirit, tries to scare the guys.

The Isolation Permutation. Amy is heartbroken when Bernadette and Penny go shopping for wedding dresses without her.

The Ornithophobia Diffusion. Can friends with benefits still be friends without? Leonard and Penny try hanging out alone, while Sheldon must overcome his fear of birds.

Flaming Spittoon Acquisition. Sheldon becomes jealous and considers taking his relationship with Amy to the next level when Stuart from the comic book store asks her out on a date.

Mile High Club. Forrest and Sheena get freaky. Elise confronts Nat. Lisa seeks cleansing. Stig surprises Aviva. Rick is given an ultimatum. Emma leaves Morocco.

The Act Of Cobwebbing. Liz comes clean about her love life to Villa. Sophie shocks Pedro when she reveals she's going on a date. Kim jumps into an international romance.

The Last Unicorn. Louis is covered in scaly skin that makes him feel like an alligator. Jennifer can't focus on her career due to a large unicorn-like lump on her forehead.

This Cyst Persists. Half of Mary's body is a size 18 while the other is an 8. Anthony's cyst is in the area called the Triangle of Death, and Shane wants to get a lump off his back.

Joyce's Story. Joyce needs home health care and hasn't left the house in three years. When Dr. Now prescribes therapy, she must revisit an unhappy past with her mum.

V.I.Pnina. On the days that Kleinfeld is closed to the public, dress designer Pnina Tornai meets with VIP clients for exclusive appointments to discuss their dress dreams.

Performance Piece. Tony Danza makes his debut at the salon to help his Broadway co-star find the perfect bridal costume for her role in their new musical, Honeymoon in Vegas.

Designer Dreams. Courtney said yes to Mark Zunino's sketch, but now it's time to try on the real gown. Jillian wants a fashion forward dress but her mother isn't making it easy.

The Sale Is On! Over 200 brides from, all over the country, queue for the Kleinfeld salon sale. Hundreds of dresses are up for grabs. But will everyone leave happy?

Teleshopping.

Teleshopping.

Dolomite, Apple Slices. Sheldon makes a new friend who introduces him to a new field of science, while his parents disagree on how to handle Sheldon's blossoming social life.

Killer Asteroids, Oklahoma. A disappointing loss at the science fair sparks an existential crisis and sends Sheldon's life in a new direction.

Jiu-Jitsu, Bubble Wrap. When Sheldon is bullied by an unlikely character, Mary and George disagree on how to handle the situation.

A Mother, A Child. When Mary bans Sheldon from reading a mature comic book, Sheldon decides it's time to assert his independence from his mother.

Gluons, Guacamole. When Sheldon is no longer academically challenged at Medford High, he audits a college class taught by a professor.

A Dog, A Squirrel. A heated argument erupts between the Coopers and their neighbours when a new dog terrorises Sheldon.

A Pregnancy Test. Georgie's jealousy rears its head when Mandy gets sent on an overnight work trip with boss, who also happens to be her ex.

Refuge Of The Downtrodden. Georgie, Mandy, and the family do their best to lift Connor's spirits during a rough patch while Connor tries to figure out a plan for his life.

The Precious Fragmentation. The guys go to a garage sale and find a ring from the Lord of the Rings films, and the rare find threatens their friendship.

The Pants Alternative. Sheldon's fear of speaking in front of large groups threatens his ability to accept an award, so the gang tries to help him prepare for the big night.

The Wheaton Recurrence. Sheldon squares off at the bowling alley against nemesis Wil Wheaton. Leonard's miffed over Penny's response when he says, 'I love you.'.

The Spaghetti Catalysis. Following Leonard and Penny's break up, Sheldon tries to hide from Leonard and the gang that he had a friendly spaghetti dinner at Penny's.

The Plimpton Stimulation. Sheldon hosts a visiting female physicist, but her intelligence seems matched by her libido.

The Staircase Implementation. A squabble over the thermostat setting leads to Leonard going over to Penny's and recounting the story of how he met and moved in with Sheldon.

The Lunar Excitation. Howard and Raj set Sheldon up on an Internet dating site. Penny discovers that she can't go back to dating dumb jocks after dating Leonard.

The Robotic Manipulation. Howard uses a robotic arm for his own pleasure. Sheldon goes on a date with Amy Farrah Fowler, and Penny finds herself accompanying them.

Cruciferous Veg Amplification. Sheldon calculates that he'll be dead before technology exists to download his consciousness into a robot, so he goes on a healthy-living binge.

The Zazzy Substitution. Sheldon breaks up with Amy Farrah Fowler, and the guys worry when he starts replacing her with cats.

The Hot Troll Deviation. Wolowitz is embarrassed when a secret of his is revealed, and Sheldon and Raj battle at work.

The Desperation Emanation. Sheldon meets Amy's mum and comes to the realisation he no longer wants to see Amy, and Leonard realises everyone is in a relationship except for him.

The Irish Pub Formulation. When Raj's sister has a one-day layover, he forbids the others from hooking up with her, unaware she and Leonard already did long ago.

The Apology Insufficiency. The rest of the gang is interviewed by the FBI for Wolowitz's security clearance, with Sheldon accidentally letting slip some damaging information.

The 21-Second Excitation. The guys camp out to see a print of Raiders of the Lost Ark with 21 extra seconds and are outraged to see Wil Wheaton and his friends skip the line.

The Boyfriend Complexity. Penny asks Leonard to lie to her visiting father, while Howard, Raj and Bernadette spend all night looking through a telescope.

The Alien Parasite Hypothesis. Amy crushes on one of Penny's dim ex-boyfriends, Zack. Raj and Wolowitz argue over who'd be the better superhero.

Justice League Recombination. The guys get Zack and Penny to join their Justice League costume for a New Year's Eve bash at the comic book store.

The Bus Pants Utilization. Their friendship becomes strained when Sheldon tries to take over Leonard's creation of a smartphone application that solves differential equations.

The Love Car Displacement. Howard is jealous when Bernadette runs into her old boyfriend at a science event they're attending.

Jerry! Jerry! Jerry! Producers and former guests reveal the dark stories of alleged abuse, incest, and deaths behind what was America's number 1 talk show.

Surviving A Serial Killer. Surviving The Casanova Killer. A single mum is shocked to find a serial killer in her home. To survive, she must get him to fall in love with her.

Every Rosacea Has Its Thorn. Patrick's nose is covered by huge bumps and he can barely breathe. Matt has suffered from neurofibromatosis his entire life and is in incredible pain.

Summer Sausage, Pocket Poncho. While Sheldon is obsesses over Meemaw's budding relationship with his mentor, Dr. Sturgis, George and Mary attempt to bond with their other kids.

Ice Cream, Gentlemen Callers. When Meemaw is pursued by two gentlemen callers, Sheldon interferes, forcing her to set some ground rules.

at over 600lbs each neither can use the stairs. Can Dr. Now fix their co-dependent eating?

A Comedian Walks into a Bridal Salon. Not even the mannequins are safe when comedian Kathy Griffin conspires with Randy to give her former assistant the surprise of her life.

Sexy Sells. Nik pushes his wife Erendira to choose a sexy gown within limits! Amy wants the raciest dress possible, and Jaya is hesitant to adhere to her fiancé's preference.

Like Mother, Unlike Daughter. Thanks to Dad, Valerie's budget is unlimited, but Mum doesn't care for her sexy dress choices. Haley lets her mum do the dress shopping for her!

Drama, Drama, Drama! WyQuasia's family spends more time bickering than listening to what the bride wants! Shelley's enormous entourage makes dress shopping impossible.

Teleshopping.

Teleshopping.

A High-Pitched Buzz. Sheldon dismantles the refrigerator to stop an annoying hum and then must get a paper route to pay for the repairs.

A Rival Prodigy. When Dr. Sturgis bonds with Paige, another 10-year-old genius, Sheldon gets jealous. Meanwhile, Mary invites Paige's family over for a play date.

A Crisis Of Faith. When Mary's faith is shaken by a tragedy in the community, Sheldon becomes an unlikely ally.

A Financial Secret. When George Sr. asks Sheldon to keep a secret from Mary, the stress of not being honest drives Sheldon to hide out at Tam's for his first sleepover.

A Research Study. Dr. Sturgis recommends Sheldon and Missy for a university research study on twins, and Mary is unhappy when the test results go to Sheldon's head.

Seven Deadly Sins. Mary clashes with Sheldon's drama teacher Mr. Lundy over plans for a Halloween haunted house fundraiser for the church.

The Thespian Catalyst. Sheldon wants acting lessons from Penny, hoping they will make him a better teacher.

The Benefactor Factor. After meeting at a fundraising gala, an aged but wealthy Caltech donor makes Leonard ponder if he's willing to have sex with her to secure a donation.

The Cohabitation Formulation. Howard contemplates a serious decision in his relationship with Bernadette, and Leonard and Raj's sister start seeing each other again.

The Toast Derivation. Sheldon is in a crisis when he realises he's not the epicentre of the group, so he decides to find new friends.

The Prestidigitation Approximation. Leonard has a tough choice to make when Priya asks him to stop spending time with Penny, and Howard keeps pestering Sheldon with a magic trick.

The Zarnecki Incursion. The guys become sleuths to find out who hacked Sheldon's online-game account.

The Herb Garden Germination. Sheldon and Amy decide to start rumours about themselves as a social test. Howard takes his relationship with Bernadette to an even higher level.

The Agreement Dissection. Priya uses her legal expertise to rip apart Sheldon's roommate agreement, and the women take the flustered Sheldon out dancing.

The Wildebeest Implementation. Raj makes an attempt to cure his phobia of talking to women, and Penny spies on Leonard and Priya with the help of Bernadette.

The Engagement Reaction. Mrs. Wolowitz ends up in the hospital after Howard tells her he's marrying Bernadette. While there, Leonard stresses over Penny and Priya.

The Roommate Transmogrification. Mrs. Wolowitz ends up in the hospital after Howard tells her he's marrying Bernadette. While there, Leonard stresses over Penny and Priya.

The Skank Reflex Analysis. Penny worries that she's screwed things up permanently with her friends after her night with Raj, while Sheldon takes command of the paintball team.

The Pulled Groin Extrapolation. Leonard and Amy get to know each other better at a co-worker's wedding. Howard and Bernadette spend the weekend with Mrs. Wolowitz!

The Wiggly Finger Catalyst. Raj is upset he's the only one of the four guys who's not in a relationship, so Penny sets out to find the perfect date.

Russian Rocket Reaction, The. Sheldon and Leonard get invited to a housewarming party at Wil Wheaton's house. Howard gets an out-of-this-world opportunity!

The Rhinitis Revelation. Craving a little motherly love, Sheldon competes with the gang for his mother's attention when she comes to visit.

The Good Guy Fluctuation. A cute comic book artist tests Leonard's relationship with Priya, while Sheldon, getting into the Halloween spirit, tries to scare the guys.

The Isolation Permutation. Amy is heartbroken when Bernadette and Penny go shopping for wedding dresses without her.

The Ornithophobia Diffusion. Can friends with benefits still be friends without? Leonard and Penny try hanging out alone, while Sheldon must overcome his fear of birds.

Flaming Spittoon Acquisition. Sheldon becomes jealous and considers taking his relationship with Amy to the next level when Stuart from the comic book store asks her out on a date.

Faith Out The Wazoo. Audrey and Mary's feud rears its head when Georgie needs their help with the tyre store, and Jim's forced to confront his age after visiting the DMV.

A Load Of Yankee Psychobabble. Georgie and Mandy get upset when Audrey disciplines CeeCee without their permission.

Cruise. Sara and Roisin board a Greek cruise, exploring the ship's poorly reviewed activities. Sara lives out her dream of being a cruise entertainer.

A penniless young man is hired to retrieve a millionaire's playboy son from Italy but becomes intoxicated by the lush life - to a dangerous degree.

Cruise. Sara and Roisin board a Greek cruise, exploring the ship's poorly reviewed activities. Sara lives out her dream of being a cruise entertainer.

Carbon Dating, Stuffed Raccoon. Sheldon gets into trouble with fellow child genius Paige at the Science Museum, while George Sr. is forced to play therapist to Paige's parents.

Tumor Takeover. Matt has a skin condition that causes tumours to grow all over his body. Plus, Jennifer has a unicorn bump on her forehead.

More Money, More Problems. Kandice is worried her custom made gown may not be all that she hoped for. Plus, in search of the perfect dress, money is no object for Aleshia.

Til Dress Do Us Part. After losing 100-lbs, Stephanie wants to show off her new curves in a sexy wedding dress. Meanwhile, Akisha is worried her dress won't impress her fiancé.

If You've Got It, Flaunt It. Kia is a pro-basketball player embracing her height, as she looks for the perfect long dress for her six-inch heels. But how will she get on?

A Chart Topping Dress. Aspiring country music star Whitney Duncan wants a romantic lace gown to give her some curves. Plus, a bride with a big personality seeks a matching dress.

One of a Kind Dress Requests. Having tried on 100 gowns, Lisa is still looking for her dream dress. Meanwhile, Brittany is determined to wear pink on her big day.

Teleshopping.

Teleshopping.

Joyce's Will Be Done. Molly is shocked when Joyce reveals she's leaving the house to Victoria in her will.

The Good Wife. Molly's leisure activities between novels become an issue for Mike. Tensions rise as he wants her to be the perfect homemaker.

Weekend With Birdie. Mike is excited to bring a new stray dog into the home. But Molly isn't so sure and has trouble warming up to the new family member.

A Research Study. Dr. Sturgis recommends Sheldon and Missy for a university research study on twins, and Mary is unhappy when the test results go to Sheldon's head.

Seven Deadly Sins. Mary clashes with Sheldon's drama teacher Mr. Lundy over plans for a Halloween haunted house fundraiser for the church.

Carbon Dating, Stuffed Raccoon. Sheldon gets into trouble with fellow child genius Paige at the Science Museum, while George Sr. is forced to play therapist to Paige's parents.

The Pulled Groin Extrapolation. Leonard and Amy get to know each other better at a co-worker's wedding. Howard and Bernadette spend the weekend with Mrs. Wolowitz!

The Wiggly Finger Catalyst. Raj is upset he's the only one of the four guys who's not in a relationship, so Penny sets out to find the perfect date.

Russian Rocket Reaction, The. Sheldon and Leonard get invited to a housewarming party at Wil Wheaton's house. Howard gets an out-of-this-world opportunity!

The Rhinitis Revelation. Craving a little motherly love, Sheldon competes with the gang for his mother's attention when she comes to visit.

The Good Guy Fluctuation. A cute comic book artist tests Leonard's relationship with Priya, while Sheldon, getting into the Halloween spirit, tries to scare the guys.

The Isolation Permutation. Amy is heartbroken when Bernadette and Penny go shopping for wedding dresses without her.

The Ornithophobia Diffusion. Can friends with benefits still be friends without? Leonard and Penny try hanging out alone, while Sheldon must overcome his fear of birds.

Flaming Spittoon Acquisition. Sheldon becomes jealous and considers taking his relationship with Amy to the next level when Stuart from the comic book store asks her out on a date.

The Wreck Of The Vincent Moranto. Despite promising to work together, Vince bails on finishing a do-it-yourself project with Mike.

Baby, Please Don't Go. Molly learns that a former student is not only pregnant but homeless. When she brings her home, family and friends are concerned.

Baby Bump. Mike and Molly realise that Frannie doesn't have any plans in place for after the baby is born. Molly decides to help by organising a family reunion.

An 8-Bit Princess. When Meemaw gives Sheldon his first video game, it takes over their lives. Meanwhile, George Sr. gets jealous when Georgie bonds with Herschel.

Family Dynamics And Red Fiero. Sheldon studies his family for a psychology project when their Thanksgiving dinner turns into a fight after George Sr. is offered a job in Oklahoma.

Stunted Childhood. When Sheldon learns that stunted childhoods can turn people into outcasts, he tries to act his age. Meemaw and Dr. Sturgis's relationship is tested.

The Speckerman Recurrence. Leonard must face his fears after being contacted by his high school tormentor, while Penny realises that she might have been a bully herself.

The Shiny Trinket Maneuver. Sheldon gets in trouble with Amy, and it's up to Penny to teach him how to be a better boyfriend. Howard deals with Bernadette's dislike of children.

The Recombination Hypothesis. Everything might change when Leonard offers Penny a spur of the moment invitation to a romantic dinner for two on the 100th episode of the series.

The Beta Test Initiation. Leonard and Penny experiment with dating again by 'beta testing' their relationship. Raj develops a weird bond with his phone's virtual assistant.

The Friendship Contraction. Sheldon's selfish demands force Leonard to reconsider their friendship. Meanwhile, Howard tries to pick his astronaut nickname.

The Vacation Solution. When Sheldon is forced to take a vacation by the university, he goes to work with Amy in her neurobiology lab.

The Rothman Disintegration. When a corner office at the university opens, Sheldon must compete for it with his office nemesis, Barry Kripke. Penny gets an unusual gift from Amy.

The Werewolf Transformation. A change in Sheldon's routine forces him to re-evaluate his entire life, when his barber is sick. Howard rethinks his decision to go into space.

Dara Ó Briain hosts hilarious chat and games with guests Rhys James, Angela Barnes, Alasdair Beckett-King, Ria Lina, Sean McLoughlin and Mark Simmons.

Cruise. Sara and Roisin board a Greek cruise, exploring the ship's poorly reviewed activities. Sara lives out her dream of being a cruise entertainer.

Runaway Bump, Never Coming Back? Leonard has a bump hanging off his arm that looks like it's breaking through skin. Jess has a visible lump on her butt after falling downstairs.

Romancing The Lump. Dr. Sandra Lee treats Heather, who has a huge growth on her leg and fears removing it could leave a keloid scar. And, Paul has a giant hump on his back.

Hips Don't Lie. Rhonda has bumps all over her head, including a worrying horned growth. And, Dr. Lee treats Kevin, who has a huge lump protruding from his hip.

Seana's Story. Seana is 23 and nearly 700-lbs, living at her mum's house, depressed and anxious. Dr. Now can give her the tools she needs to live, but only she can save herself.

A Gown Worth the Trip. With Alaska coming up short on options, Liz has flown 4,000 miles to find a dress. Amanda has exhausted all options in Europe, with high hopes for the salon.

Nothing Ordinary Here. Erin wants a blue dress for her wedding, but she has to convince her sceptical entourage. Plus, Kate is in search of a unique dress that incorporates colour.

No Room for Compromise. Petite bride, Christine is looking for a gown to match her 20's theme wedding. Plus, Valentina returns for her fitting to add a personal touch to her gown.

A Kleinfeld Family Affair. Danielle, close family friend of Dorothy, has a very special surprise in store. Meanwhile, consultant Katie is delighted to turn customer for the day.

Teleshopping.

Teleshopping.

The Wreck Of The Vincent Moranto. Despite promising to work together, Vince bails on finishing a do-it-yourself project with Mike.

Baby, Please Don't Go. Molly learns that a former student is not only pregnant but homeless. When she brings her home, family and friends are concerned.

Baby Bump. Mike and Molly realise that Frannie doesn't have any plans in place for after the baby is born. Molly decides to help by organising a family reunion.

An 8-Bit Princess. When Meemaw gives Sheldon his first video game, it takes over their lives. Meanwhile, George Sr. gets jealous when Georgie bonds with Herschel.

Family Dynamics And Red Fiero. Sheldon studies his family for a psychology project when their Thanksgiving dinner turns into a fight after George Sr. is offered a job in Oklahoma.

Stunted Childhood. When Sheldon learns that stunted childhoods can turn people into outcasts, he tries to act his age. Meemaw and Dr. Sturgis's relationship is tested.

The Speckerman Recurrence. Leonard must face his fears after being contacted by his high school tormentor, while Penny realises that she might have been a bully herself.

The Shiny Trinket Maneuver. Sheldon gets in trouble with Amy, and it's up to Penny to teach him how to be a better boyfriend. Howard deals with Bernadette's dislike of children.

The Recombination Hypothesis. Everything might change when Leonard offers Penny a spur of the moment invitation to a romantic dinner for two on the 100th episode of the series.

The Beta Test Initiation. Leonard and Penny experiment with dating again by 'beta testing' their relationship. Raj develops a weird bond with his phone's virtual assistant.

The Friendship Contraction. Sheldon's selfish demands force Leonard to reconsider their friendship. Meanwhile, Howard tries to pick his astronaut nickname.

The Vacation Solution. When Sheldon is forced to take a vacation by the university, he goes to work with Amy in her neurobiology lab.

The Rothman Disintegration. When a corner office at the university opens, Sheldon must compete for it with his office nemesis, Barry Kripke. Penny gets an unusual gift from Amy.

The Werewolf Transformation. A change in Sheldon's routine forces him to re-evaluate his entire life, when his barber is sick. Howard rethinks his decision to go into space.

The Adoption Option. The adoption agency has scheduled a home visit and Mike and Molly must be on their best behaviour to make a good impression.

Curse Of The Bambino. Carl convinces Mike to go with him to see a psychic. Meanwhile, Peggy drags Molly to her church to pray for something they've been waiting for.

I See Love. Mike and Molly gather with friends and family for a momentous occasion. They celebrate and reminisce about everything that brought them together.

Race Of Superhumans. While Missy unknowingly becomes Sheldon's test subject, Georgie joins Mary's Bible study to spend more time with his crush, Veronica.

Tummy Ache And Whale Metaphor. When Sheldon has to spend a few days in the hospital, he turns into the world's worst patient, and his behaviour takes a toll on everyone.

Nuclear Reactor And Boy Lovey. While Sheldon attempts to build a nuclear reactor to power the neighbourhood, Georgie is heartbroken when he learns that Veronica has a boyfriend.

The Weekend Vortex. Sheldon chooses to participate in a guys-only weekend Star Wars gaming marathon rather than go with Amy to her aunt's birthday party.

The Transporter Malfunction. It's a dream come true for Sheldon when he has a close encounter with his hero, Mr. Spock -legendary sci-fi icon Leonard Nimoy.

The Hawking Excitation. When Wolowitz gets to work with world-renowned scientist, Stephen Hawking, Sheldon is willing to do anything to meet his hero.

The Stag Convergence. Howard's wedding plans are in jeopardy after the guys throw him a bachelor party, and details of his sexual history are leaked online.

The Launch Acceleration. When NASA reschedules Howard's mission and puts his wedding plans in jeopardy, he's forced to face his fears - and Bernadette's dad.

The Countdown Reflection. When Howard and Bernadette decide they want to be married before his NASA space launch, the gang rushes to put on a wedding.

The Date Night Variable. Howard discovers that he can't escape his mother - even in space! Back on earth, meanwhile, Raj turns his existence as a third wheel into an art form.

The Decoupling Fluctuation. After learning Penny is thinking about breaking up with Leonard, Sheldon tries to intervene. Howard is being picked on in space by the astronauts.

Kody's apology to Christine starts well but gets tense when David brings up Kody's relationships with his kids. Janelle seeks guidance from Meri.

You Are Toxic To Me. Kody's apology to Meri gets tense, as she doubts his sincerity, challenging his comments. Janelle asks her church for a spiritual release from Kody.