Sheldon meets a graduate student, Ramona Nowitzki (Riki Lindhome) who becomes infatuated with him and soon enters into some form of relationship with him.
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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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Leonard comes home to find out the guys spied on how his date with Penny went via a webcam they put in the hallway.
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Penny tells poor Sheldon a secret whether he wants to hear it or not. Unfortunately that secret involves Leonard and puts him in a difficult situation.
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Penny and Leonard return from their first date and Penny tells Leonard she wants to take it slow. Poor guy.
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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.