Amy records Sheldon talking in his sleep and tries to convince him that he has a more laid-back side. Meanwhile, Raj and Stuart compete to win the heart of Bernadette's new co-worker.
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Wolowitz and Sheldon bond over their relationships with their disappointing fathers when they drive to the desert to shoot off a model rocket. Leonard's mom finds a new best friend in Penny, much to Leonard's dismay.
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Sheldon and Raj confide in Bernadette when they can't handle Amy and Howard working together. Penny and Leonard learn new tactics on how to deal with Sheldon and they come from an unlikely source.
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Sheldon goes head-to-head with Wil Wheaton for the role of the new Professor Proton. Penny steps in and takes care of Halley when Bernadette and Howard both wind up on bed rest.
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Sheldon and Bert collaborate on a research project, despite Sheldon's embarrassment. Penny and Bernadette coach Koothrappali on how to navigate his relationship with Ruchi.
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Leonard and Howard are furious after they learn Sheldon went to work with the military behind their backs. Bernadette is on bed rest, and she asks Raj to do some digging when she suspects Ruchi is trying to steal her job.
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Sheldon tries to teach the guys a lesson after they cut him out of a potentially valuable Bitcoin investment. Also, a seven-year-old video reveals a secret about Leonard and Penny's relationship.
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Sheldon and Amy try to eliminate stress from wedding planning by applying math to the process. Raj "breaks up" with Howard after realizing his best friend is actually hurting his confidence.
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Sheldon and Howard plan birthday celebrations for Amy and Halley, respectively. Leonard receives a Christmas letter from his brother that causes him to spiral out about his own lack of accomplishments.
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To discover who would be most qualified to be best man and maid of honor at their wedding, Sheldon and Amy subject their friends to a series of secret experiments. Also, Penny reveals her true feelings about Amy.
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When Sheldon learns that his mother won't attend his wedding unless he invites his brother, George, he and Leonard travel to Texas to end a family feud. The Wolowitz kids inadvertently infest Amy, Bernadette, Howard and Raj with pinkeye.
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The Season 11 finale: When Amy's parents and Sheldon's family arrive for the wedding, everybody is focused on making sure all goes according to plan--everyone except the bride and groom.
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In the Season 12 premiere, Sheldon and Amy's honeymoon runs aground in New York, while Penny and Leonard discover they are uncomfortably similar to Amy's parents. Raj insults physicist Neil deGrasse Tyson and starts a twitter war.
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Sheldon and Amy drive themselves crazy trying to figure out what "perfect gift" Leonard and Penny gave them for their wedding. Raj decides he wants to settle down and asks his father to arrange a marriage for him.
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About
Leonard and Sheldon are brilliant physicists, the kind of ''beautiful minds'' that understand how the universe works. But none of that genius helps them interact with people, especially women. All this begins to change when a free-spirited beauty named Penny moves in next door.
