The Big Bang Theory Season 3 Episode 15
Leonard can only bring one guest on a trip to see CERN’s Large Hadron Collider (the world’s largest and highest energy particle accelerator) in Switzerland on Valentine’s Day.
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Serie: The Big Bang Theory
Director: Mark Cendrowski
Guest Star: Jim Parsons, Johnny Galecki, Kaley Cuoco, Kevin Sussman, Kunal Nayyar, Mayim Bialik, Melissa Rauch, Simon Helberg
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