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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The boys all end up competing for Sheldon's sister, Missy's affection. Raj and Wolowitz even get into a physical fight.
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Penny humiliates Leonard about his toys and he decides he's going to get rid of all his nerdmabilia in this episode of The Big Bang Theory.
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The guys gather round Leonard as he sits in his time machine which arrive. The time machine is, of course, the prop from the 1960 movie that he bought off ebay.
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The boys gather around Leonard as he gets the winning bid on the time machine from the 1960 movie <i>The Time Machine</i>.
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Penny falls asleep when she, Wolowitz and Raj go to listen to Leonard give a presentation.
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Raj and Sheldon get into an argument when Raj is out on his blind date. Guess who she goes home with?
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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.

A neutron walks into a bar and asks, "How much for a drink?" The bartender says, "For you? No charge."

Sheldon