Howard and Leonard must get a pigeon out of the clean room at the University on The Big Bang Theory.
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Wolowitz practices before pitching in the big game on The Big Bang Theory. "The First Pitch Insufficiency" is the third episode of the show's eighth season.
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Bernadette and Amy bring the Death Star Cake to the Star Wars Day celebration.
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Sheldon, Howard and Raj start celebrating Star Wars Day on May 4th.
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The gang introduces Penny to Star Wars Day on May 4th.
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Howard shows Leonard a drawing of ... something. What is that supposed to be?
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Barry Kripke annoys Sheldon and Howard during their lunch break.
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Howard arrive for his double date with his wife, Raj and Emily.
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TBBT Quotes

Penny: Here's a question-- as an alien pretending to be human, are you planning to engage in any post-prom mating rituals with Amy?
Sheldon: There are post-prom mating rituals?
Penny: Not always. Unless your date drives a van with an air mattress, then always.
Sheldon: Well, if it's part of the prom experience, then I'm open to it.
Penny: You're kidding.
Sheldon: I may be an alien, but I have urges.If Amy wants to copulate by firing her eggs into space, well, then, I will happily catch them with the reproductive sac on my upper flermin. I'm not the best at reading facial cues, but I can see that you're a little turned on.

Penny, there's only one cookie with something in the middle that solves life's problems, and that's an Oreo. Or a Nutter Butter, if you're in a pinch.

Sheldon