Leonard consoles Sheldon after letting him know a hero of his died.
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The gang introduces Penny to Star Wars Day on May 4th.
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Sheldon and Penny go out for dinner together on "The Anything Can Happen Recurrence."
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Sheldon talks to Leonard wearing a robe in their kitchen.
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Is Sheldon sleeping with the Geology book? Nice robe!
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Sheldon has a Geology book. Why would he have that?
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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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TBBT Quotes

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.

Penny: Hey, Sheldon, did you change your Wi-Fi password again?
Sheldon: Yes, it's "Penny, get your own Wi-Fi." No spaces.