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There's A Shark In The Salon! It's sink or swim for Randy when reality star Barbara Corcoran comes in. Bridgette needs a dress to say yes in and then run in a Vegas half-marathon.

I'm The Bride, Leave Some Space! Nikki wants a 'party on a dress' for her New Year's Eve wedding, and there's an unlimited budget! Natalie craves a huge ballgown for her big day.

Mike risks losing his eyebrows when he starts construction on the basement for he and Molly, while Carl invites Samuel to move in with him.

Mike and Molly encourage Harry to take Victoria on a date for Valentine's Day, and everyone is shocked when she accepts.

Mike studies male fertility and visits a clinic to ensure that his 'swimmers' are up to the task of starting a family with Molly.

When Sheldon learns the house next door is for sale, he looks for the perfect neighbours. Missy pitches against her boyfriend at the baseball game.

Sheldon has a scientific breakthrough at the dentist. Dale and Meemaw go to the casino. Georgie makes a mistake when he's left in charge of the store.

Sheldon discovers that Mary's been keeping a secret about his future. Also, Meemaw is furious when she learns that Dale fired Georgie.

An online troll rips Leonard and Sheldon's physics paper, and a girls' night out leads to Penny, Amy and Bernadette dishing about embarrassing events.

Howard gets unsettling news amidst the excitement of the comic book store reopening, and Penny doesn't practice what she preaches.

An experiment designed to make people fall in love piques Penny and Leonard's interest. Meanwhile, Leonard, Amy, Raj and Emily encounter a 'zombie.

There's trouble in paradise when Amy learns Sheldon signed up for a one-way mission to colonise Mars. Leonard makes an 'adult' purchase for Penny.

An electrical short thaws the last meal cooked by Mrs. Wolowitz, and Sheldon and Leonard's work is featured in a magazine, but only one gets credit.

Leonard and Sheldon consider dropping by George Lucas' Skywalker Ranch when a speaking engagement puts them nearby.

Sheldon and Amy reach a crossroad, a man claiming to be Wolowitz's half-brother shows up, and Penny and Leonard argue live on Wil Wheaton's podcast.

NASA asks Raj to craft a message for aliens in the event of contact, and Penny must choose between an audition or her job in pharmaceutical sales.

Molly enjoys some retail therapy and goes off on a shopping spree after Mike storms off over a disagreement and disappears at the mall.

Carl and Samuel host a party in hopes of attracting some ladies. Meanwhile, Molly reveals secrets from her previous St. Patrick's Day excursions.

Molly joins her sister on a Spring Break road trip to party with Victoria's friends from junior college, while Mike asks his boss for some overtime.

After graduating high school, Sheldon has a breakdown when he realises he may not be ready for college. Also, Dale tries to make amends with Meemaw.

While Sheldon volunteers at a local train museum, Missy embarks on a new stage of womanhood, and Georgie discovers his mother's guilty pleasure.

Sheldon is determined to ride his bike without training wheels and has Missy teach him. Mary and George argue over parenting styles.

Wolowitz and Sheldon can't get a drone to fly, Leonard nearly misses giving a commencement address, and Raj pits his parents against each other.

Leonard and Sheldon's mothers come to town to celebrate their sons getting an award, but the opinionated women engage in an altercation over religion.

Leonard and Penny are pressured to set a wedding date by Sheldon, whose relationship with Amy has taken an interesting turn.

Penny has a problem dealing with Leonard's confession about having kissed another woman, while Sheldon is confused about Amy calling a time out.

To ease Penny's mind, Leonard pays a visit to the woman he kissed during his expedition to the North Sea. Sheldon's breakup leads him to retaliate.

The guys surprise Leonard with a belated bachelor-party weekend in Mexico, but their plans hit a bump in the road when they get a flat tire.

Sheldon reverts to 2003 when he learns that Leonard and Penny are moving in together, while Howard and Raj form a band to play at the comic store.

When Barry Kripke gives the guys fencing lessons, he makes a point of letting Sheldon know he's interested in dating Amy.

Feels Like Ants Crawling On Me. Dr. Emma is shocked when 35-year-old Faizah's 'herbal' cream bought online leaves her skin red, raw, painfully inflamed, and itchy.

Mohammed's body is covered with hundreds of tumours. Dr Emma embarks on three intense surgeries to remove over 150 from his face.

Dr Emma gets to the bottom of why Claire is incessantly picking her skin. And after 20 years, Robert finally gets a diagnosis for his painful lumps.

Lookin' For Love In Lumpy Places. Gabriel has a huge growth on his clavicle but is terrified of surgery. Karen has dealt with painful, scaly feet for 22 years with no diagnosis.

Ruben is a personal trainer whose head growth has prevented him from seeing clients. Kaitlin has blue marks and scars due to long-term drug use.

Turning down medical advice, Mark believes he can lose 500 pounds on his own. But Dr. Now sees this as another excuse not to change.

Did I Hear Someone Say $16,000? Randy assists brides and auditions models for his runway show. Bride Emanuela wants a sexy ball gown and she'll blow her dad's budget to get it.

That's How You Dress A Lady. Randy's runway show is finally here and it's his big opportunity to show he's back as a designer for good! And bride Jaqueline is at odds with her mum.

Molly enjoys some retail therapy and goes off on a shopping spree after Mike storms off over a disagreement and disappears at the mall.

Carl and Samuel host a party in hopes of attracting some ladies. Meanwhile, Molly reveals secrets from her previous St. Patrick's Day excursions.

Molly joins her sister on a Spring Break road trip to party with Victoria's friends from junior college, while Mike asks his boss for some overtime.

After graduating high school, Sheldon has a breakdown when he realises he may not be ready for college. Also, Dale tries to make amends with Meemaw.

While Sheldon volunteers at a local train museum, Missy embarks on a new stage of womanhood, and Georgie discovers his mother's guilty pleasure.

Sheldon is determined to ride his bike without training wheels and has Missy teach him. Mary and George argue over parenting styles.

Wolowitz and Sheldon can't get a drone to fly, Leonard nearly misses giving a commencement address, and Raj pits his parents against each other.

Leonard and Sheldon's mothers come to town to celebrate their sons getting an award, but the opinionated women engage in an altercation over religion.

Leonard and Penny are pressured to set a wedding date by Sheldon, whose relationship with Amy has taken an interesting turn.

Penny has a problem dealing with Leonard's confession about having kissed another woman, while Sheldon is confused about Amy calling a time out.

To ease Penny's mind, Leonard pays a visit to the woman he kissed during his expedition to the North Sea. Sheldon's breakup leads him to retaliate.

The guys surprise Leonard with a belated bachelor-party weekend in Mexico, but their plans hit a bump in the road when they get a flat tire.

Sheldon reverts to 2003 when he learns that Leonard and Penny are moving in together, while Howard and Raj form a band to play at the comic store.

When Barry Kripke gives the guys fencing lessons, he makes a point of letting Sheldon know he's interested in dating Amy.

Molly and Peggy try to play nice for Mike's birthday. Meanwhile, Samuel and Carl compete for the same woman.

Deciding to pursue new hobbies before becoming parents, Molly encourages Mike to take up roller-skating with her.

Mike goes on a junk food binge to cope with missing Molly, while she's away. Meanwhile, Carl contemplates leaving Chicago.

Bible Camp And A Chariot Of Love. Sheldon ends up in a fierce competition with Paige after their mums force them to attend Vacation Bible School. Georgie makes a questionable purchase.

While Mary and George take a trip, Georgie freaks out when his girlfriend thinks she's pregnant. Dale and Meemaw work out their relationship issues.

While college orientation does not go as Sheldon planned, Mary is mistaken for a university student and invited to a party.

A helium shortage leads Sheldon and Leonard to do business with a dealer in the black market to acquire some of the element for an experiment.

Sheldon's interview for a 'Star Trek' documentary focusing on Spock turns up a shocking revelation about his breakup with Amy.

When Leonard, Penny and Bernadette learn that Amy is going out on a dinner date, the trio set out to spy on her and the guy.

Sheldon and Amy spend Thanksgiving at the aquarium, Wolowitz volunteers at a soup kitchen, and Penny realises that Leonard knows a lot about her.

God only knows what song is constantly playing in Sheldon's head, but it reminds him of Amy and leads to a surprising revelation.

Professor Proton visits Sheldon in a dream and gives him Obi-Wan-like advice about whether to go see the new Star Wars film or spend time with Amy.

Penny entices Leonard to meet with a psychiatrist, Stuart moves out of the Wolowitz house, and Howard and Bernadette find themselves at a loss.

Dealing with an under-the-weather Sheldon is draining for Penny, Leonard and the gang so they decide to treat themselves to a Sheldon-less weekend.

Please Let Him Propose To Me! Shocked by Andy's revelation about her daughter, Arrah's mum storms out. Sam discovers Ali is playing games, and Shorna forgets her vow of chastity.

It's Almost Game Over, Isn't It? Andy prepares to marry Arrah, but it's mixed emotions without loved ones by his side. Marco belatedly asks Sarah's dad for her hand in marriage.