Sheldon and Injured Penny

Sheldon and Injured Penny

With Leonard gone, Sheldon helps an injured Penny. She looks a little loopy here.
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Picking Up Sheldon

Picking Up Sheldon

Leonard and Penny act as parents as they go to pick up Sheldon from the comic book store.
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Sheldon Visits Penny

Sheldon Visits Penny

Sheldon comes to visit Penny at work at the Cheesecake Factory to try and convince her to apologize to Leonard to stop the fighting.
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Epic Card Battle

Epic Card Battle

In this epic card battle it's Sheldon and Raj versus Sheldon's nemesis Wil Wheaton (guest starring as himself) and Stuart.
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Sheldon Versus Wil Wheaton

Sheldon Versus Wil Wheaton

Sheldon goes up against his nemesis Wil Wheaton (guest starring as himself) in a game of cards.
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Stuart is Back!

Stuart is Back!

It looks like Stuart is back on next week's episode of The Big Bang Theory as he and guest start Wil Wheaton go up against Sheldon and Raj.
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Penny Ruins Oatmeal Day

Penny Ruins Oatmeal Day

When Penny spends the night at Leonard's she ends up ruining oatmeal day by cooking french toast. How dare she?
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Sheldon Uses Positive Reinforcement

Sheldon Uses Positive Reinforcement

When Leonard tells Sheldon he needs to use more honey than vinegar on Penny, he tries an experiment where he uses chocolate as positive reinforcement on Penny. Amazing.
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Lewis Black on Big Bang

Lewis Black on Big Bang

Lewis Black guest stars as an entomologist on The Big Bang Theory and he helps settle a bet between Sheldon and Wolowitz.
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Wolowitz and Sheldon Bet

Wolowitz and Sheldon Bet

Wolowitz and Sheldon make a high stakes bet (some of their best comic books) over who's right on the species of a cricket they heard.
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The Boys Search for the Cricket

The Boys Search for the Cricket

In order to settle a bet, Sheldon, Wolowitz and Raj search out the cricket to identify its species.
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Hairy Leonard and Sheldon

Hairy Leonard and Sheldon

Hairy Leonard is very eager to see Penny upon his return from their three month expedition and is a little upset at Sheldon for crashing their good makeup time.
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TBBT Quotes

Penny: Hey, Sheldon, did you change your Wi-Fi password again?
Sheldon: Yes, it's "Penny, get your own Wi-Fi." No spaces.

James Earl Jones: Why don't you and your friends come to Comic-Con with me?
Sheldon: Really?
James Earl Jones: Of course. And San Diego is right across the border from my favorite city on Earth, Tijuana.... where I'm taking you every night!
Sheldon: Ay-yi-yi.
James Earl Jones: Ay-yi-yi. Bang. Bang.