Sheldon pushes Penny and Leonard to set a date for their wedding.
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Penny and Sheldon design an experiment made to get the participants to fall in love on The Big Bang Theory.
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The girls remember some of their most embarassing moments on The Big Bang Theory. "The Troll Manifestation" is the 14th episode of the show's eighth season.
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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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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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Amy and Bernadette discuss female scientists who use their sexuality on The Big Bang Theory.
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Simon Helberg plays Howard Wolowitz on The Big Bang Theory
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Kaley Cuoco-Sweeting plays Penny on The Big Bang Theory.
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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.

Sheldon: Why do you have the Chinese character for "soup" tattooed on your right buttock?
Penny: It's not "soup," it's "courage."
Sheldon: No it isn't. But I suppose it does take courage to demonstrate that kind of commitment to soup.
Penny: How'd you see it? You said you wouldn't look.
Sheldon: Sorry. As I told you, the hero always peeks.