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Sheldon interviews with a school for gifted children. Much to their surprise, the rest of the family struggle with his absence.

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

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

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

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

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.

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

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

Leaving the baby in daycare proves to be tough for Bernadette, and geologist Bert digs up a girlfriend, but some colleagues think she's a gold digger.

Leonard isn't thrilled when Penny considers taking a new job offered by her ex-boyfriend, Zack.

Leonard, Sheldon and Wolowitz celebrate the completion of their top-secret military project, until an unpleasant surprise leaves their heads spinning.

Sheldon's former admirer, Dr. Ramona Nowitzki, turns up while Amy is visiting Princeton, and the gang is extremely concerned.

What did she say? Amy answers Sheldon's marriage proposal. Meanwhile, Howard and Bernadette struggle with some unexpected news.

Leonard's job is at stake when he gives an embarrassing radio interview which angers the university and the entire physics community.

Amy tries to convince Sheldon that he has a more laid-back side, meanwhile, Raj and Stuart compete to win the heart of Bernadette's new co-worker.

Wolowitz and Sheldon bond over their relationships with their disappointing fathers. And Leonard's mum finds a new best friend in Penny.

Sheldon and Raj confide in Bernadette when they can't handle Amy and Howard working together. Penny and Leonard learn new ways to deal with Sheldon.

Sheldon goes head-to-head with Wil Wheaton. Penny takes care of Halley when Bernadette and Howard are both on bed rest.

Sheldon and Bert collaborate on a research project, while Penny and Bernadette coach Koothrappali on how to navigate his relationship with Ruchi.

Leonard and Howard learn Sheldon went to work with the military. Bernadette suspects Ruchi is trying to steal her job.

The guys cut Sheldon out of a potentially valuable Bitcoin investment. Also, an old video reveals a secret about Leonard and Penny's relationship.

Sheldon and Amy try to eliminate stress from wedding planning using maths. Raj realises his best friend is actually hurting his confidence.

Sheldon and Howard plan birthday celebrations for Amy and Halley. Leonard spirals out about his lack of accomplishments.

Sheldon and Amy subject their friends to a series of experiments to choose the best man and maid of honour. And Penny reveals her true feelings.

Amy and Leonard bond during a series of experiments. Bert replaces Howard in Footprints on the Moon, and Sheldon finds Penny a source of inspiration.

Raj learns the woman he's dating has a very upset husband. Sheldon rents his old room for a quiet place to work.

Wil Wheaton offers Amy a role on the new 'Professor Proton Show,' and Penny thinks the female protagonist in Leonard's novel is based on her.

All Bernadette's friends try different tactics to get labour started. Amy accidentally reveals she's already chosen their son's name.

Robert is back to see if Dr. Lee and Dr. Umar can remove his recurring head keloid for good. Justice has small lesions all over her body that get inflamed.

Debra has a large, brainlike growth on the side of her head that feels like a sponge, has crevices and emits an odour. Cowboy Dusten has painful lump on his knee.

Eric hopes Dr. Lee can remove the giant growth from his backside. Plus, Michael makes jokes, but he knows the bump on his head is anything but funny.

Dr. Lee meets Jon, who suffers from a huge bump on his shoulder blade. Plus, April wants to get married but feels hideous due to her bumpy underarm.

Dr. Lee meets with Tobi, who has symmetrical bumps around her spine. Later, Dr. Tomassian learns how to remove a huge, floppy arm bump.

Lifelong secret eater Nikki is threatened by immobility as her weight climbs to 650-lbs. She has a gastric bypass and confronts the emotional causes for her eating.

Weighing over 700 pounds at 26-years-old, the clock is ticking on Ashley's life. Ashamed of her body, surgery offers hope, but not without setbacks.

At 700 pounds, Chad undergoes gastric bypass surgery. He quickly sheds pounds, but faces a medical crisis when he does not follow the doctor's orders.

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.

Keturah has her heart set on a fishtail gown, but her brother suggests a princess look. And, Karen's dreams for a ball gown may not come true.

Nichale always dreamed of a fishtail style, but mum is paying, and she wants a princess dress! Kayleigh returns after a massive meltdown, will she be happy with her gown.

Ayesha falls in love with the first dress she tries on, but also loves the second dress as well! Plus, Nichale has another fitting and finds her dress is too small.

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

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

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

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

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

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

Mandy's attempt to help Missy with boys backfires when Mary finds out and Georgie is caught in the crossfire.

When CeeCee loses her favourite toy, Mandy and Meemaw take it as an opportunity to make some money.

Leonard tries to secure the perfect wedding venue for Sheldon and Amy. Bernadette and Howard have a hard time deciding who should go back to work.

Bill Gates' company wants to partner with Penny's pharmaceutical company. Leonard, Raj and Howard do everything in their power to meet him.

Leonard decides to run against Sheldon for president of the tenants' association. Bernadette encourages Howard and Raj to find the owner of a drone.

A reclusive scientist invites Sheldon to his remote cabin. Penny and Bernadette improvise after Amy doesn't like the bachelorette they planned.

Sheldon's comic book store experience changes when Neil Gaiman puts Stuart's store on the map. And Raj takes credit for Penny's astronomical discovery.

Sheldon goes to Vegas to win money for science. Penny and Bernadette take Amy wedding dress shopping, but her choice entangles them in a web of lies.

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.

Dara Ó Briain extracts humour from current events with guests Rhys James, Neil Delamere, Milton Jones, Zoe Lyons, Sara Pascoe and Ahir Shah.

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

Dara Ó Briain extracts humour from current events with guests Rhys James, Neil Delamere, Milton Jones, Zoe Lyons, Sara Pascoe and Ahir Shah.

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.

Jack fainted during a previous attempt to remove his throat bump. Can Dr. Lee help this time? Plus, Dr. Tomassian reconstructs Victoria's earlobes.

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.

At 670 pounds, Ashley is desperate to save her life and her marriage to husband David. Can weight-loss surgery give her the chance for a family of her own.

New mum Laura has seen her dream dress online, but will she love its lacey A-line style in real life? Lutifah has two wedding gowns, but fears they won't fit.

Kristin wants the advice of her friends to help her find the perfect gown. Problems arise when she thinks she's found the one, but her friends don't agree.

Nikki looks for a dress that will wow at her big fat Greek wedding. Stephanie is keen to show off her newly slender figure and hopes to find a fitted frock.

The Hecks spend New Year's Day at the Orson Escape Room. Mike is stunned when Frankie reveals that she had a romantic dream involving Frank Sinatra.

Frankie is elated when she wins a month of free maid service. Axl, Hutch and Kenny attempt to move in with Sue and Lexie in their college housing.

Brad agrees to coach Sue's no-cut acapella group. Brick asks for Frankie and Mike's advice when girlfriend Cindy tells him that he reads too much.

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

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

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.

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.

Frankie is sad when informed that her days of having kids are over. Sue and Axl are shocked when her roommate and Sean Donahue start flirting.

Frankie and Mike frantically attempt to shut off the water when the pipes burst. The Hecks call a meeting to deal with their bickering.

Mike's dislike of dentistry leads to escalating falsehoods to avoid having his toothache fixed. Brick attempts to write a Scottish-themed rap musical.

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

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.

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.

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.

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.

Dara Ó Briain extracts humour from current events with guests Rhys James, Neil Delamere, Milton Jones, Zoe Lyons, Sara Pascoe and Ahir Shah.

After their house is trashed without an obvious cause, a couple install video surveillance to record the chilling supernatural events in their house.