Amy and Bernadette plan a rooftop prom on The Big Bang Theory. "The Prom Equivalency" is the eighth episode of the show's eighth season.
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Amy and Bernadette discuss female scientists who use their sexuality on The Big Bang Theory.
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Raj and Sheldon head into a steam tunnel for an experiment on The Big Bang Theory. "The Expedition Approximation" is the sixth episode of the show's eighth season.
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The boys look to make something new and cool but end up procrastinating on The Big Bang Theory. "The Focus Attentuation" is the fifth episode of the show's eighth season.
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Raj gets into trouble when his girlfriend gives Penny the cold shoulder on The Big Bang Theory. "The Hook-Up Reverberation" is the fourth episode of the show's eighth season.
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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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Everyone is shocked when Howard signs up to take Sheldon's class on The Big Bang Theory. "The Junior Professor Solution" is the second episode of the show's eighth season.
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A little help here? Sheldon is in Arizona on The Big Bang Theory Season 8 premiere.
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TBBT Quotes

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

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.