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Big Bang Theory - Episode 2.5 - "The Euclid Alternative"

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Big Bang Theory - Episode 2.5 -

The season two DVD set of CBS' brainy physics-based The Big Bang Theory.

Chuck Lorre Production/CBS

The Bottom Line

The group holds an intervention, forcing Sheldon to work on getting a driver's license, a task which he feels he's too evolved for. This is another episode with some great Penny/Sheldon interaction.
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  • Hilarious dialogue.
  • Dynamic characters.


  • Too short!


  • 20 minutes
  • Available on Disk 1 of The Big Bang Theory's Season Two DVD collection.
  • Starring Jim Parsons (Sheldon), Johnny Galecki (Leonard), Kaley Cuoco (Penny), Simon Helberg (Howard), and Kunal Nayyar (Raj)
  • Created by Chuck Lorre & Bill Prady
  • Originally aired October 20, 2008

Guide Review - Big Bang Theory - Episode 2.5 - "The Euclid Alternative"

After driving everyone nuts by making them cart him around, the gang decides that Sheldon needs to learn how to drive.

Physics in This Episode

  • X-ray Diffraction - The episode begins with Leonard entering the apartment in the morning exhausted. He indicates that he was up all night using a free-electron laser for an x-ray diffraction experiment.
  • Supergravity - Sheldon indicates that he didn't get his license at sixteen because he was working on supergravity, which is one of various approaches toward a theory of quantum gravity.
  • Friction - At the DMV, Sheldon argues about the questions. One asks when the roads are most slippery, and he points out that it's when there's a thin coat of liquid that reduces the coefficient of friction to nearly zero, but not thick enough to introduces a new source of friction.

Notable Quotes

Sheldon: I just don't see why I need a driver's license? Albert Einstein never had a driver's license.
Howard: Yes, but Albert Einstein didn't make me wet myself at 40 miles an hour.
Penny: And I never wanted to kick Albert Einstein in the nuts.
Penny: You know, I gotta ask, why didn't you just get a license at sixteen, like everybody else?
Sheldon: I was otherwise engaged.
Penny: Doing what? Sheldon: Examining perturbative amplitudes in n=4 supersymmetric theories, leading to a reexamination of the ultraviolet properties of multi-loop n=8 supergravity, using modern twistor theory.
Penny: Well, how about when you were seventeen?

More quotes at Internet Movie Database.

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