[s3e15] The Large Hadron Collision May 2026

is the 15th episode of the third season of The Big Bang Theory , which originally aired on February 8, 2010. In this Valentine's Day-themed episode, Leonard is invited to visit the Large Hadron Collider in Switzerland and must choose between taking his girlfriend, Penny, or his roommate, Sheldon. Plot Summary

Sheldon attempts various tactics to change Leonard's mind, including bribery with "Frodo-shaped pancakes," citing roommate clauses, and even presenting a PowerPoint to Penny on why she shouldn't go. [S3E15] The Large Hadron Collision

"The Big Bang Theory" The Large Hadron Collision (TV ... - IMDb is the 15th episode of the third season