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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.
More episodes
The Big Bang Theory
S5, EP5 "The Russian Rocket Reaction"Wil Wheaton invites Leonard and Sheldon to a party at his house; Howard receives an opportunity.
The Big Bang Theory
S5, EP20 "The Transporter Malfunction"When Penny buys Leonard and Sheldon "Star Trek" collectibles, Sheldon finds himself haunted by Mr. Spock; after a blind date, Raj believes he has met his future wife.
The Big Bang Theory
S9, EP7 "The Spock Resonance"Sheldon struggles to keep his emotions in check when he is interviewed for a documentary about Spock; Penny and Leonard make a surprising discovery; Wolowitz and Bernadette get into a disagreement about remodeling his childhood home.
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
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.
