Still from The Big Bang Theory S3E15
The Big Bang Theory › Season 3

S3 E15: The Large Hadron Collision

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.

Air dateFeb 8, 2010
Runtime21 minutes
TMDB rating★ 7.7/10