Sheldon and Leonard go dress shopping with Penny and Amy on The Big Bang Theory. "The Space Probe Disintegration" is the 12th episode of the show's eighth season.
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Howard and Leonard must get a pigeon out of the clean room at the University on The Big Bang Theory.
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Sheldon says goodby to "Fun with Flags" on The Big Bang Theory. "The Champagne Reflection" is the tenth episode of the show's eighth season.
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Leonard has minor surgery on his nose on The Big Bang Theory. "The Septum Deviation" is the ninth episode of the show's eighth season.
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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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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

Leonard: Hi. I'm Leonard. You are beautiful. You pop, sparkle and buzz electric. I'm going to pick you up at eight, show you a night you will never forget.
Raj: Where are we going?