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Leonard and Sheldon each lie to avoid hearing Penny sing in a production of Rent. However, Sheldon's lie becomes a bit too complicated.

With his friends knowing how sour he acts when sick and avoiding him as a result, Sheldon is nursed by Penny, who hasn't a clue what she's in for.

With Sheldon rattled after meeting Dennis, a teen physicist who's smarter than he is, the rest of the guys search for a way to eliminate the threat.

Sheldon finds himself booted from the gang's Physics Bowl team and replaced with Leslie, so he forms his own team hoping to prove he's superior.

When the delivery of a full-size prop of 1960's 'The Time Machine' causes Penny to miss work, she scolds Leonard about his sci-fi collectibles.

Elise grows suspicious of Joshua's relationship with a female friend, and Forrest and Sheena receive troubling news about the K-1 visa.

Debbie arrives to fix things between Cortney and Colt. Vanja's trip to Maine turns toxic. Kim is ready to find the daughter she placed for adoption.

Elizabeth's head is covered with giant cauliflower-shaped bumps. Jamaal has been growing a strange knob on his bottom since he was just a boy.

Holy Cyst?! Kenny's rare condition causes hundreds of lumps to grow all over his body. Plus, Paula's painful and swollen feet ooze a foul-smelling substance.

Kelly inherited her love of food from her obese mum. After a personal tragedy her weight ballooned to over 700-lb and she is nearly immobile.

Deborah is after an off-the-shoulder, glamorous gown but her entourage has conflicting opinions! Plus, will Dahlia go with her mum's preference of a princess dress.

Stubborn Sophie knows just what she wants - and refuses to come out in the first dress! Plus, bride Emma clashes with her friend over her dress choice.

Bride Hattie has no idea what she's after and David's at a loss! Will they let mum choose? Lisa knows what she wants but her entourage has other ideas.

Glam gran Angela is three times lucky in love and won't compromise on her dream dress: can her entourage change that? Bride Emily wants to shine in a gold gown.

Sheldon takes his first engineering class with Professor Boucher. Meanwhile, Meemaw and Dale help take care of his ex-wife, June.

While Sheldon battles the mysterious Grand Chancellor of the university over science requirements, Mary makes a shocking discovery about Georgie.

While George Sr. plays handyman at Brenda Sparks' house, Sheldon gets the science yips and has to learn how not to think.

Sheldon gets a dorm room all to himself, which soon becomes the campus hotspot. Meanwhile, Meemaw gets an unwanted business partner.

Sheldon acts as Mary's spy when he's forced to spend the night at church for a youth lock-in. Meanwhile, Georgie gets attracted to an older woman.

Sheldon attends his first comic book convention, and Mary tries selling makeup.

A Tie Breaker & A Huge Mistake. Tensions rise when new co-owners Georgie and Ruben realise they can't agree on anything. Jim struggles to find his purpose now that he's retired.

Georgie's upset when Mandy's new role as weekend weather girl gets her more attention from the men in town, and Connor turns to Jim for help.

Sheldon and Leonard travel to Texas to end a family feud. The Wolowitz kids inadvertently infest Amy, Bernadette, Howard and Raj with pinkeye.

When Amy's parents and Sheldon's family arrive, everybody is focused on making sure all goes according to plan - everyone except the bride and groom.

Sheldon and Amy's honeymoon runs aground, while Penny and Leonard discover similarities with Amy's parents. Raj insults physicist Neil deGrasse Tyson.

Sheldon and Amy try to figure out what 'perfect gift' Leonard and Penny gave them. Raj asks his father to arrange a marriage for him.

Stuart starts bringing his new girlfriend home, Penny and Leonard talk about starting a family, and Raj explores an arranged marriage.

Sheldon won't tell anyone why he's never mentioned his childhood friend Tam. Bernadette and Penny take out Raj's fiancée to get the skinny on her.

Amy doesn't have time to work on a project, so Sheldon goes to great lengths to ensure she can work with him, even if it means sabotaging her career.

When Howard dresses up as Sheldon for Halloween, Sheldon seeks retaliation. Leonard is shocked that Penny doesn't remember their first kiss.

Leonard is caught in a tough spot when he's responsible for distributing extra grant money. Bernadette turns the backyard playhouse into a hideaway.

Sheldon tries to bond with Amy's father, but Howard lures Mr. Fowler away with magic tricks. Raj and Anu try to get physical for the first time.

Sheldon and Amy are devastated learning that Super Asymmetry has been discovered and disproven. Bernadette asks Denise to help her win a videogame.

A VHS tape inspires Sheldon to not give up on his and Amy's theory. Bernadette turns into a pageant mom over Howard's Magic Castle audition.

Penny and Leonard organise a paintball game that results in mayhem. Raj catches Anu with her ex, and Stuart doesn't want to move in with Denise.

Penny's ex, Zack, and his wife want a baby, but when Zack is infertile, they ask Leonard to help. Raj attempts to mend things with his ex-fiancée.

Sheldon and Amy's theory is proven by two physicists, who then try to kick Amy off the Nobel nomination. Bernadette has a big success at work.

Sheldon helps Bernadette and Howard navigate bureaucratic paperwork. Leonard is disappointed when his friends exclude him from a scientific project.

Penny tries to seduce an abstaining Leonard to ruin his 'donation' for her ex-boyfriend and his wife. Raj's cancelled bachelor party takes a turn.

The gang finds out Wil Wheaton hosts a celebrity Dungeons and Dragons game. Deception and betrayal are the path to make it to the one open seat.

While Bernadette is away and Howard is in charge of the kids, Sheldon finds a book on experimenting on kids. The guys plus Amy make a day of it.

Pemberton and Campbell charm America, so Sheldon and Amy bring Nobel laureates Kip Thorne, George Smoot and Frances Arnold to their side.

Joey Fatone pulls back the curtain on the boy band machine, revealing how fame is manufactured - and the toll it takes on the artists.

A man who calls himself 'The Bishop' abducts six women. As captives begin to die, one woman knows her only chance of survival is to escape.

Sheldon makes friends with his dorm neighbours. Meanwhile, George Sr. learns his job is in jeopardy.

When a new scientist, Dr. Lee, joins the lab, Sheldon is the odd man out. Meanwhile, Mary is given a lotto ticket.

Jacqueline's shoulder growth makes it difficult to do fire spinning, her favourite hobby. And the mysterious bump on James' cheek loves to bleed.

When Annjeannette was nine, a campaign was set up to send her to fat camp. The fat-shaming has continued, and she has struggled with food addiction.

Bride Lotis knows what dress she wants: can David help her find it with her dad cutting in? Indecisive Lauren brings her opinionated friends to help her.

Bride Lynnike wants a 'bootylicious' gown to show off her curves. And, Samantha's mum doesn't want her gown too sexy, but her bridesmaids think otherwise.

Ex-soldier Emma won't let her wheelchair stop her walking down the aisle. But, will her daughter like her dress choice? And, Becki plans to elope without her family.

Bride Elivia wants a showstopping dress no one has seen before. And, after brain surgery Charlotte wants a fierce dress for an unconventional wedding.

Sheldon joins Dr. Linkletter and Dr. Sturgis on a science road trip, landing them in the middle of nowhere. Georgie continues to lie about his age.

When Meemaw's gambling room is a success, she ends up with a suitcase of illegal cash. Missy starts a business, and Sheldon tries the stock market.

Sheldon gets an odd request from an old friend, while George and Mary are caught in the middle of Meemaw and Dale's breakup.

While Sheldon copes with the death of a hero, Georgie struggles with his big secret, and Missy wants to babysit.

George and Mary insist on meeting the new woman in Georgie's life, while Sheldon and Missy have suspicions about what's going on with their family.

Despite the whole family trying to keep it a secret, Sheldon and Missy learn about Georgie's pregnancy.

Amy has a meltdown due to the pressure associated with winning a Nobel Prize. Raj and Howard try to relive the good old days.

Raj is worried people won't take him seriously in his own field after publishing a paper that suggests he may have discovered alien life.

Kripke has proof that Dr. Pemberton plagiarized his thesis, and Sheldon and Amy aren't sure whether they should turn him in or not.

Leonard is surprised when Beverly is kind to him on a visit, until he finds out the real reason she's there. Denise and Stuart overstay their welcome.

Everything changes as Amy and Sheldon await big news. Howard and Bernadette leave their kids, while Leonard and Penny keep a secret.

Bernadette and Howard leave their kids, Penny and Leonard try to keep a secret, Sheldon and Amy stick together, and Raj makes a new friend.

Brilliant physicists Leonard and Sheldon meet new neighbour Penny, who shows them that although they're smart, they know very little about real life.

Leonard volunteers to sign for a package to make a good impression on Penny, but things go terribly awry when he enlists Sheldon for help.

Leonard is depressed to learn that Penny is dating someone. Encouraged by his friends and fellow scientists, he asks a colleague out on a date.

Sheldon gets fired and explores what life has to offer outside physics, leaving Leonard to take drastic action to snap his friend out of his funk.

Fearing he's wasting his time on Penny, Leonard makes a connection with Leslie. Meanwhile, Sheldon frets over a change to his hamburger routine.

Penny hosts a Halloween party, putting Leonard, Sheldon, Wolowitz and Koothrappali through a new test of their social skills.

When Wolowitz goes AWOL with one of her friends, Penny's recruited to fill in for him on the guys' Halo team.

Raj's parents set him up on a blind date, and when he discovers he can talk to her, she shows interest in Sheldon.

When they're invited to present at a physics conference, Sheldon's reluctance to share the credit leads to a tiff between him and Leonard.

Leonard and Sheldon each lie to avoid hearing Penny sing in a production of Rent. However, Sheldon's lie becomes a bit too complicated.

With his friends knowing how sour he acts when sick and avoiding him as a result, Sheldon is nursed by Penny, who hasn't a clue what she's in for.

With Sheldon rattled after meeting Dennis, a teen physicist who's smarter than he is, the rest of the guys search for a way to eliminate the threat.

Sheldon finds himself booted from the gang's Physics Bowl team and replaced with Leslie, so he forms his own team hoping to prove he's superior.

When the delivery of a full-size prop of 1960's 'The Time Machine' causes Penny to miss work, she scolds Leonard about his sci-fi collectibles.

A Will And A Dead Man's Wife. Georgie's not ready for his mother to start dating again. Meanwhile, Jim and Audrey struggle to make their wills.

Georgie and Ruben get their hands dirty when Fred Fagenbacher tries to run them out of business. Meanwhile, Mandy grows suspicious of Georgie's lies.

Roisin and Sara explore Bergen and Voss on a budget, dining at a Norwegian buffet, playing black metal and canoeing to find rubbish on a fjord.

A moronic mob bagman, his noisy girlfriend, and a closeted gay hit man all collide on a trip to Mexico to recover a supposedly cursed gun.

Roisin and Sara explore Bergen and Voss on a budget, dining at a Norwegian buffet, playing black metal and canoeing to find rubbish on a fjord.

With the Coopers facing judgement from the congregation in the wake of Georgie's pregnancy, Sheldon is distracted by the family drama.

Blingy bride Lucille arrives in love with a satin dress. Plus, spicy bride Joan loves a dress from her hometown but arrives wanting one no one else can get.

When Angela's family is unable to join her on her weight-loss journey, she reaches out to an old love, who is willing to go to Texas with her.

Fashionista Katie and tomboy Yazmin are marrying each other and both looking for dresses! Jasmine is anxious to cover her cleavage - will she dare to bare.

Bride Abigail and her entourage are drawn to the sparkliest gowns in the shop! But, will her budget allow for extreme bling? And, Léah seeks a quirky fitted gown.

Bride Alis likes fishtail frocks, but her mum is set on a princess look. Can David break the deadlock? After trying over 30 dresses Lyndsey's brought her friends for help.

When his car breaks down, Mike is forced to decide whether or not to accept a loan from Carl to fix it.

Late at night, Molly catches Carl coming out of Victoria's room, leaving her questioning whether or not she will tell Mike.

Mike wants Peggy to see a doctor after her bathtub falls through the ceiling.

George and Mary insist on meeting the new woman in Georgie's life, while Sheldon and Missy have suspicions about what's going on with their family.

Despite the whole family trying to keep it a secret, Sheldon and Missy learn about Georgie's pregnancy.

With the Coopers facing judgement from the congregation in the wake of Georgie's pregnancy, Sheldon is distracted by the family drama.

When Wolowitz goes AWOL with one of her friends, Penny's recruited to fill in for him on the guys' Halo team.

Raj's parents set him up on a blind date, and when he discovers he can talk to her, she shows interest in Sheldon.

When they're invited to present at a physics conference, Sheldon's reluctance to share the credit leads to a tiff between him and Leonard.

Leonard and Sheldon each lie to avoid hearing Penny sing in a production of Rent. However, Sheldon's lie becomes a bit too complicated.

With his friends knowing how sour he acts when sick and avoiding him as a result, Sheldon is nursed by Penny, who hasn't a clue what she's in for.

With Sheldon rattled after meeting Dennis, a teen physicist who's smarter than he is, the rest of the guys search for a way to eliminate the threat.

Sheldon finds himself booted from the gang's Physics Bowl team and replaced with Leslie, so he forms his own team hoping to prove he's superior.

When the delivery of a full-size prop of 1960's 'The Time Machine' causes Penny to miss work, she scolds Leonard about his sci-fi collectibles.

Molly gets accepted into an elite eight-week writer's workshop in Iowa but faces a big decision when Mike asks her not to go.

Molly returns home after eight weeks at a writing workshop with great news: she's getting published and scored a big book advance.

Molly comes down with a case of writer's block. If she doesn't shake it fast, she'll be in danger of losing her big advance.

Sheldon struggles with the first signs of puberty while his parents hunt for new jobs, and Georgie and Meemaw take a business trip across the border.

Nine-year-old Sheldon learns that his high intelligence isn't always helpful growing up in East Texas, where church and football are king.

To appease his worried mother, Sheldon employs the techniques of a self-help book to try and make a friend.

The gang fall for Sheldon's twin sister, and Leonard's plan to win her heart is derailed when Sheldon declares he'll decide who can date her.

Penny wants to throw a surprise party for Leonard, but Sheldon's indulgence at an electronics store throws her off-track.

Penny's breakup spurs Leonard to summon the courage to ask her out, and they both go to Sheldon for advice on their upcoming date.

Penny opens up to Sheldon after a less-than-stellar first date with Leonard, placing him in the uncomfortable position of having to keep a secret.

Seeing Penny with another guy sends Leonard back to Leslie Winkle, much to Sheldon's dismay.

Penny becomes addicted to an online game based on the world of Conan the Barbarian and persistently pesters Sheldon for advice.

Full of confidence following being named one of People's 30 to Watch Under 30, Raj hits on Penny and becomes impossibly arrogant.

An intervention is used to try to force Sheldon to overcome his fear of driving.

Dara Ó Briain introduces topical chat and hilarious games with guests Rhys James, Ahir Shah, Angela Barnes, Lou Sanders, Ed Byrne and Milton Jones.

Roisin and Sara explore Bergen and Voss on a budget, dining at a Norwegian buffet, playing black metal and canoeing to find rubbish on a fjord.

Lisa fears the horn growing out of the back of her head could be cancer. Chuck has a Popeye-shaped bump on his arm, and two teen brothers have matching lumps.

Cedric has a bump on his eye and a lump on his neck that stops him from working. Katherine's ear cluster puts her neighbourhood watch job at risk.

Jimmy wants his alligator skin cured so he can find love. Djuka is a stubborn guy with a stubborn bump. Talina has hundreds of tumours on her body.

Bed-bound for two years, Lashanta relies on her kids to clean and feed her. She wants to join Dr. Now's programme but needs help to leave the house.

Bride Jackie is confused about what dress she wants, all she knows is that she wants bling. Plus, Gemma returns to try on her dress, but she can't get into it.

Bride Kerri already bought one dress but now she hates it, so David has his work cut out trying to find a new one. And, Hannah thinks she's made a big mistake.

Traditional. Grace has her heart set on a simple lace dress, but her best friend thinks she should go for slinky and sparkly. Plus, Jenny has to make a quick decision.

Sophie is keen to hide her bum in an A-line dress, but her entourage think she should show it off. And, new mum Claire wants to hide her mummy tummy.

Molly gets accepted into an elite eight-week writer's workshop in Iowa but faces a big decision when Mike asks her not to go.

Molly returns home after eight weeks at a writing workshop with great news: she's getting published and scored a big book advance.

Molly comes down with a case of writer's block. If she doesn't shake it fast, she'll be in danger of losing her big advance.

Sheldon struggles with the first signs of puberty while his parents hunt for new jobs, and Georgie and Meemaw take a business trip across the border.

Nine-year-old Sheldon learns that his high intelligence isn't always helpful growing up in East Texas, where church and football are king.

To appease his worried mother, Sheldon employs the techniques of a self-help book to try and make a friend.

The gang fall for Sheldon's twin sister, and Leonard's plan to win her heart is derailed when Sheldon declares he'll decide who can date her.

Penny wants to throw a surprise party for Leonard, but Sheldon's indulgence at an electronics store throws her off-track.

Penny's breakup spurs Leonard to summon the courage to ask her out, and they both go to Sheldon for advice on their upcoming date.

Penny opens up to Sheldon after a less-than-stellar first date with Leonard, placing him in the uncomfortable position of having to keep a secret.

Seeing Penny with another guy sends Leonard back to Leslie Winkle, much to Sheldon's dismay.

Penny becomes addicted to an online game based on the world of Conan the Barbarian and persistently pesters Sheldon for advice.

Full of confidence following being named one of People's 30 to Watch Under 30, Raj hits on Penny and becomes impossibly arrogant.

An intervention is used to try to force Sheldon to overcome his fear of driving.

'Tis The Season To Be Molly. Mike assures Molly he'll be home in time for Christmas Eve dinner until he and Carl end up in the back of a stolen truck.

Mike thinks Carl is out of line when he invites Victoria to go on what is supposed to be a men-only fishing trip.

Molly's constant rewrites on her book begin to irritate Mike and the family and leave them wondering if the end is anywhere in sight.

When George Sr. is rushed to the emergency room, Meemaw comes to babysit. And the kids have an adventure getting to the hospital on their own.

Sheldon refuses to eat solid food after a choking scare but finds solace in a new interest after he discovers comic books.

A Solar Calculator, A Game Ball. Sheldon uses his statistics skills to help his father coach the football team. Both Sheldon and Georgie struggle with the popularity this brings.

Sheldon and his friends are mystified when a younger undergraduate student is attracted to him.

When Sheldon bans Penny from the apartment, she decides to retaliate. Howard and Raj search for the America's Next Top Model house.

Sheldon wants to use an alternate version of rock-paper-scissors to help resolve conflicts. A girl Wolowitz has a major crush on falls for Leonard.

Sheldon is over-exuberant that Leonard finally has a girlfriend matching his high standards.

Leonard seeks Penny's counsel when his relationship with Stephanie takes. Sheldon's hypochondriac tendencies get the better of him.

Sheldon irks the gangs with his obsession with proper Christmas gift protocol. Leonard's crushed when Penny dates a colleague of his.

Penny's criticism of Wolowitz's romantic life pushes him into depression and AWOL for a fighting robot battle the guys are depending on him for.

Looking to get friendly with Barry Kripke to gain access to a piece of high-tech lab equipment, Sheldon develops a flowchart process to make friends.

It's an awkward showdown at Coyote Pass with Kody, Robyn, Janelle, and Meri. Kody considers therapy to help repair relationships with his children.

Meri ventures out of her comfort zone and attends a dating event. Kody owns up to his bad behaviour and decides to apologize to each of his ex-wives.

Dennis has several giant growths on his head. Juan has a rare condition he hopes Dr. Lee will understand. Natalie is covered in hundreds of mysterious dark bumps.

Brittney has hundreds of tiny bumps over her chest that have destroyed her confidence. John has a nose the size of a plum. Dr. Lee's friend drops in.

Mike's religious beliefs have kept him from seeing a doctor about his huge growth. Plus, Kylie debates whether to remove her birthmark.

Having spent the last two years in his bed due to his weight, Cillas' food addiction prevents him from being there for his fiancée and her three daughters.

Bride Lisa wants a dress that will show off her butterfly tattoo. Plus, Ashley has lost four stone and is looking for a fitted gown to emphasise her new figure.

Amber always dreamed of being a princess on her wedding day, but her strict budget may restrict her. Tori thought she wanted a big gown, until she tries a fishtail.

Karlie is hoping to find an even better dress than one she found at another bridal store. Plus, Lauren hasn't seen her dress for six months, will she still like it.

Yvonne is looking for a mermaid-style dress, but her mum insists on a ball gown. Plus, Natalie is back for her fitting, but she's been keeping a big secret.

'Tis The Season To Be Molly. Mike assures Molly he'll be home in time for Christmas Eve dinner until he and Carl end up in the back of a stolen truck.

Mike thinks Carl is out of line when he invites Victoria to go on what is supposed to be a men-only fishing trip.

Molly's constant rewrites on her book begin to irritate Mike and the family and leave them wondering if the end is anywhere in sight.

When George Sr. is rushed to the emergency room, Meemaw comes to babysit. And the kids have an adventure getting to the hospital on their own.

Sheldon refuses to eat solid food after a choking scare but finds solace in a new interest after he discovers comic books.

A Solar Calculator, A Game Ball. Sheldon uses his statistics skills to help his father coach the football team. Both Sheldon and Georgie struggle with the popularity this brings.

Sheldon and his friends are mystified when a younger undergraduate student is attracted to him.

When Sheldon bans Penny from the apartment, she decides to retaliate. Howard and Raj search for the America's Next Top Model house.

Sheldon wants to use an alternate version of rock-paper-scissors to help resolve conflicts. A girl Wolowitz has a major crush on falls for Leonard.

Sheldon is over-exuberant that Leonard finally has a girlfriend matching his high standards.

Leonard seeks Penny's counsel when his relationship with Stephanie takes. Sheldon's hypochondriac tendencies get the better of him.

Sheldon irks the gangs with his obsession with proper Christmas gift protocol. Leonard's crushed when Penny dates a colleague of his.

Penny's criticism of Wolowitz's romantic life pushes him into depression and AWOL for a fighting robot battle the guys are depending on him for.

Looking to get friendly with Barry Kripke to gain access to a piece of high-tech lab equipment, Sheldon develops a flowchart process to make friends.

Mike engages in a little innocent flirting with a rookie policewoman and then begins to feel guilty when she reciprocates.

Samuel contemplates moving back to Africa when he receives a letter from his parents saying they're struggling financially.

When Molly learns it's been more than ten years since her husband's seen a doctor, she badgers a reluctant Mike to get checked out.

A Patch, A Modem And A Zantac. After being dismissed in class, Sheldon is determined to prove a visiting NASA representative wrong and starts studying theoretical physics.

A Brisket, Voodoo And Cannonball Run. Meemaw refuses to give George Sr. her brisket recipe. The kids try to think of ways to resolve this family feud.

George takes his sons to see a space shuttle launch. Meanwhile, Mary, Meemaw and Missy have a girl's night at the salon.

When Sheldon loans money to Penny so she can pay her rent, it leads to Leonard coming face-to-face with her ex, Kurt.

A visit from Leonard's mother ends up bringing him and Penny closer.

Paintball leads to a squabble between Sheldon and Penny as well as romance between Howard and Leslie.

The gang is thrilled to see Summer Glau is also aboard their train to San Francisco. Sheldon frets over having forgotten a paper he wants to present.

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

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

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

Leonard and Raj take Wolowitz to Las Vegas to help him get over his break-up. Sheldon locks himself out and has only one other place to stay: Penny's.

Dr. Lee meets Stephanie, who has a giant baseball-sized scalp bump. Plus, Wesley believes that a pencil lead is embedded in his palm.

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.