It's Thanksgiving on The Big Bang Theory. This is a photo from Season 7 Episode 9.
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This is a photo from "The Itchy Brain Simulation." It's Episode 7 of The Big Bang Theory Season 8.
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Sheldon looks unhappy with his dinner prospects on The Big Bang Theory. "The Thanksgiving Decoupling" is the ninth episode of the show's seventh season.
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It's Bob Newhart on The Big Bang Theory! This is a photo from "The Proton Displacement."
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Sheldon makes Leonard pays for a past mistake on The Big Bang Theory. "The Itchy Brain Simulation" is the eighth episode of the show's seventh season.
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Dr. Proton and Bill Nye the Science Guy both visit The Big Bang Theory. "The Proton Displacement" is the seventh episode of the show's seventh season.
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Sheldon feels like a fraud with his latest scientific breakthrough on The Big Bang Theory. "The Romance Resonance" is the sixth episode of the show's seventh season.
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Will Amy and Sheldon survive when they both at the university on The Big Bang Theory. "The Workplace Proximity" is the fifth episode of the show's seventh season.
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Sheldon vows revenge against Amy when she ruins his favorite movie on The BIg Bang Theory. "The Raiders Minimization" is the fourth episode of the show's seventh season.
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Will Raj's scavenger hunt bring out the best or worst in Sheldon and Penny on The Big Bang Theory? "The Scavenger Vortex" is the third episode of the show's seventh season.
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What on earth are they trying to hear on the latest The Big Bang Theory. "The Deception Verification" is the second episode of the seventh season.
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Let's dish! This is a fun photo from The Big Bang Theory Season 7 premiere.
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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: Hey, Sheldon, did you change your Wi-Fi password again?
Sheldon: Yes, it's "Penny, get your own Wi-Fi." No spaces.