A picture of the whole gang dressed in their clothes from the Renaissance Fair as they get to meet Penny's new date, Eric (Travis Schuldt)
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Leonard and Sheldon return from the Renaissance Fair dressed fully in times. Sheldon is a little disappointed in Leonard for wearing modern underwear.
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Leonard finally gets the apartment to himself for a date with Leslie Winkle. How will it go?
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Penny and Sheldon sit outside the apartment and talk while Leonard takes over the apartment for his date with Leslie.
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The Big Bang Theory Season 2 Episode 2 Quotes

Sheldon: Why should I leave? This is my apartment, too.
Leonard: I know it is. And if science ever discovers a second member of your species, and you two would like some privacy, I'll be more than happy to get out of your way

Everybody has a date. Even you Mario, going after Princess Peach. What am I doing? I'm just enabling you.

Sheldon