Leonard, Raj and Wolowitz head out to a local bar for Ladies' night. Wolowitz explains to Raj why he can't order a girlie drink during Ladies' night.
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After a little liquid courage, Raj attempts to talk to their new beautiful neighbor, Alicia (Valerie Azlynn).
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For some reason, Raj, Leonard and Wolowitz join Sheldon in helping Penny manufacture 1000 Penny Blossoms. The things a nerd will do for a pretty girl.
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Raj takes the microphone as he, Wolowitz and Sheldon play some Red Hot Chili Peppers in the video game, Rock Band. Raj kind of sounds like a dying cat but we loved his performance.
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Mrs. Hofstadter goes with her son Leonard to work and meets all the guys at lunch. She quickly analyzes each one of them.
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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 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 tries to organize a surprise party for Leonard with his friends Sheldon, Howard and Raj.
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TBBT Quotes

Sheldon: Are you still mad about the sperm bank?
Leonard: No!
Sheldon: Do you want to hear an interesting thing about stairs?
Leonard: Not really.
Sheldon: If the height of a single step is off by as little as two millimeters most people will trip.
Leonard: I don't care—two millimeters?! That doesn't seem right.
Sheldon: No, it's true! I did a series of experiments when I was twelve; my father broke his clavicle.

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