Jim Parsons as Sheldon

Jim Parsons as Sheldon

Jim Parsons stars on The Big Bang Theory as Sheldon, Leonard's best friend, co-worker and roommate. Sheldon is definitely the smarter and nerdier of the two.
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Penny Meets Dave

Penny Meets Dave

Penny meets Leonard's cute new co-worker, Dave (guest star Michael Trucco) and has an immediate crush on the cute new physicist / bad boy.
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Sheldon and Leonard

Sheldon and Leonard

A picture of Sheldon and Leonard from the series premiere of The Big Bang Theory. Sheldon and Leonard are geeks but Leonard wants more than this socially awkward roommate.
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Sheldon and Leonard Discuss the Rules

Sheldon and Leonard Discuss the Rules

Sheldon and Leonard go over the roommate bylaws now that Sheldon considers Leonard's new girlfriend a roommate and they have new rules to go over.
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Sheldon Seeks Penny's Help

Sheldon Seeks Penny's Help

Sheldon comes to Penny for help when he wants to make sure Leonard secures Stephanie as his girlfriend. He uses some casual talk that's pretty damn funny in order to get Penny to help him.
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The Big Bang Theory Poster

The Big Bang Theory Poster

The poster from the CBS sitcom The Big Bang Theory starring Johnny Galecki, Jim Parsons, and Kaley Cuoco.
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TBBT Quotes

Leonard: Hi. I'm Leonard. You are beautiful. You pop, sparkle and buzz electric. I'm going to pick you up at eight, show you a night you will never forget.
Raj: Where are we going?

Sheldon: Here's the problem with teleportation.
Leonard: Lay it on me.
Sheldon: Assuming a device could be invented, which would identify the quantum state of matter of an individual in one location and transmit that pattern to a distant location for reassembly. You would not have actually transported the individual, you would have destroyed him in one location and recreated him in another.
Leonard: How about that.
Sheldon: Personally, I would never use a transporter because the original Sheldon would have to be dissintegrated in order to create a new Sheldon.
Leonard: Would the new Sheldon be in any way an improvement on the old Sheldon?
Sheldon: No, he would be exactly the same.
Leonard: That is a problem