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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, EP5 "The Collaboration Contamination"Sheldon and Koothrappali confide in Bernadette when they can't handle Amy and Wolowitz working together; Penny and Leonard learn a secret from an unlikely source about dealing with Sheldon.
The Big Bang Theory
S1, EP6 "The Middle Earth Paradigm"Leonard, Sheldon, Wolowitz and Koothrappali attend Penny's Halloween party.
The Big Bang Theory
S6, EP13 "The Bakersfield Expedition"As the guys don costumes and go on a road trip to a comic book convention, the ladies decide to stay home and try to interpret a comic book.
The Big Bang Theory
S2, EP8 "The Lizard-Spock Expansion"Leonard inadvertently steals away the new woman Wolowitz thinks is the love of his life.
The Big Bang Theory
S9, EP21 "The Viewing Party Combustion"During a group get-together, a minor argument between Sheldon and Leonard turns into a heated debate, leaving the rest of the gang to choose sides.
The Big Bang Theory
S9, EP20 "The Big Bear Precipitation"Sheldon shares a secret about Leonard when the two go on a weekend trip with Penny and Amy; Koothrappali goes all out with pregnancy gifts.
The Big Bang Theory
S9, EP19 "The Solder Excursion Diversion"Sheldon makes a surprise revelation when Amy buys him a new laptop; Leonard and Wolowitz get sold out by Koothrappali after lying to their wives to attend a movie screening.
The Big Bang Theory
S9, EP18 "The Application Deterioration"Leonard, Sheldon and Wolowitz file for a patent on their new invention; Penny, Amy and Bernadette give dating advice to Koothrappali after his breakup with Emily.
