The Big Bang Theory

The Large Hadron Collision

Series 3 - Episode 15 The Large Hadron Collision



Leonard is invited to visit the Large Hadron Collider in Switzerland and asks Penny to join him as a Valentine's Day treat. However, Sheldon tries to persuade the couple to allow him to take her place.

Cast & Crew

Leonard Hofstadter Johnny Galecki
Sheldon Cooper Jim Parsons
Penny Kaley Cuoco
Howard Wolowitz Simon Helberg
Raj Koothrappali Kunal Nayyar
Restaurant patron Erin Pickett
Director Mark Cendrowski
Writer Maria Ferrari
Writer Jim Reynolds
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