Bernadette (Melissa Rauch) joins the guys for lunch at work as she begins to bond with Leonard over his work.
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Wolowitz confronts Leonard when he gets jealous over his friend bonding with his girlfriend, Bernadette.
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When Sheldon is embarrassed by Kripke on National Public Radio, Sheldon comes to comfort his friend.
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Raj attempts to scare the guys with a ghost story but they look a little more bored than scared.
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Leonard, Raj and Wolowitz are definitely not the manliest of men. Here they are a little scared on their camping trip.
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Leonard, Raj, and Wolowitz go camping with style... an entire array of electronics.
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Three of our favorite nerds, Leonard, Raj and Wolowitz go camping and can't help but bring a computer when they go camping.
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Things don't look so good for Raj, Wolowitz and Leonard when they go camping on The Big Bang Theory.
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Leonard and Penny act as parents as they go to pick up Sheldon from the comic book store.
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Penny joins the nerds in a friendly game of cards. Here's a cute picture of her smiling as Leonard look at her.
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We sure see a lot of Penny and Leonard in bed. Not that were complaining, this is where we want to see this couple!
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When Leonard tells Sheldon he needs to use more honey than vinegar on Penny, he tries an experiment where he uses chocolate as positive reinforcement on Penny. Amazing.
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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.

It's very simple. Scissors cuts paper, paper covers rock, rock crushes lizard, lizard poisons Spock, Spock smashes scissors, scissors decapitates lizard, lizard eats paper, paper disproves Spock, Spock vaporizes rock, and, as it always has, rock crushes scissors

Sheldon