The Big Bang Theory Season 3 Episode 15

When Leonard must travel to Switzerland on Valentine's Day to visit the CERN laboratory, Sheldon uses any and all means to be his guest instead of Penny.



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Watch The Large Hadron Collision
Air Date: 8 February 2010
Director: Mark Cendrowski
Language: English
Runtime: 20 Minutes
More Info: IMDb

Cast: Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg, Kunal Nayyar


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