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Leonard, Sheldon, Wolowitz and Koothrappali attend Penny's Halloween party.
Leonard, Sheldon, Wolowitz and Koothrappali attend Penny's Halloween party.
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The Big Bang Theory
S11, EP9 "The Bitcoin Entanglement"Sheldon tries to teach the guys a lesson after they cut him out of a potentially valuable investment; a seven-year-old video reveals a secret about Leonard and Penny's relationship.
The Big Bang Theory
S11, EP10 "The Confidence Erosion"Sheldon and Amy try to use math to eliminate wedding planning stress; Koothrappali "breaks up" with Wolowitz after realizing he is hurting his confidence.
The Big Bang Theory
S11, EP12 "The Matrimonial Metric"Sheldon and Amy subject their friends to a series of secret experiments to discover which two would be most qualified to be the best man and the maid of honor at their wedding; Penny reveals her true feelings about Amy.
The Big Bang Theory
S11, EP13 "The Solo Oscillation"Sheldon kicks Amy out to work solo; Amy and Leonard bond during a series of science experiments; Bert replaces Wolowitz in the band; Sheldon finds Penny a surprising source of scientific inspiration.
The Big Bang Theory
S11, EP24 "The Bow Tie Asymmetry"When Amy's parents and Sheldon's family arrive, everybody is focused on making sure the wedding arrangements go according to plan -- everyone except the bride and groom.
The Big Bang Theory
S11, EP23 "The Sibling Realignment"Sheldon's mother won't attend his wedding unless he invites his brother; the Wolowitz kids inadvertently infest Amy, Bernadette, Wolowitz and Koothrappali with pink eye.
The Big Bang Theory
S11, EP22 "The Monetary Insufficiency"Sheldon goes to Las Vegas to win money for science; Penny and Bernadette take Amy wedding dress shopping, but her terrible choice entangles them in a web of lies.
The Big Bang Theory
S11, EP21 "The Comet Polarization"Sheldon's comic book store experience changes when writer Neil Gaiman puts Stuart's store on the map; friendships are threatened when Koothrappali takes credit for Penny's astronomical discovery.
