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When Wolowitz dresses up as Sheldon for Halloween, Sheldon seeks retaliation at Leonard and Penny's Halloween party; Leonard is shocked when Penny doesn't remember their first kiss.
When Wolowitz dresses up as Sheldon for Halloween, Sheldon seeks retaliation at Leonard and Penny's Halloween party; Leonard is shocked when Penny doesn't remember their first kiss.
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The Big Bang Theory
S9, EP1 "The Matrimonial Momentum"Sheldon struggles to understand what is going on with Amy; Penny must decide if she can get past Leonard's bad behavior.
The Big Bang Theory
S11, EP14 "The Separation Triangulation"Koothrappali learns the woman he's dating has a very upset husband; Sheldon rents his old room for a quiet place to work.
The Big Bang Theory
S9, EP11 "The Opening Night Excitation"After dating for more than five years, Amy and Sheldon spend the night together for the first time; Leonard, Wolowitz, and Koothrappali must decide what to do with an extra movie ticket.
The Big Bang Theory
S10, EP3 "The Dependence Transcendence"Sheldon tries to stay awake with an energy drink as the gang races to finish its government project on time; Penny and Amy attend a gathering at Bert the Geologist's house; Koothrappali learns Bernadette's true feelings about her pregnancy.
The Big Bang Theory
S12, EP18 "The Laureate Accumulation"When competitors Pemberton and Campbell charm America on a publicity tour, Sheldon and Amy try to win over Nobel laureates Kip Thorne, George Smoot and Frances Arnold; Halley's fear of the dark leads to opportunity and conflict.
The Big Bang Theory
S12, EP17 "The Conference Valuation"When Penny and Bernadette go to San Diego for a pharmaceutical sales convention, Wolowitz is left in charge of the kids; Sheldon finds a book about experimenting on kids.
The Big Bang Theory
S12, EP16 "The D & D Vortex"The gang uses deception and betrayal to make it to the one open seat at Wil Wheaton's celebrity Dungeons and Dragons game with William Shatner, Joe Manganiello, Kareem Abdul-Jabbar and Kevin Smith.
The Big Bang Theory
S12, EP15 "The Donation Oscillation"Penny tries to throw a wrench into Leonard's plan to be a sperm donor for her ex-boyfriend; Wolowitz, Bernadette, Anu and Koothrappali turn Koothrappali's canceled bachelor party into a couple's trip aboard the "vomit comet."
