Series: The Big Bang Theory
Season: Season 3
Episode Number: 15
Air Date:
Duration: 21 min
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.
Mark Cendrowski
Director
Chuck Lorre
Story
Steven Molaro
Story
Jim Reynolds
Story
Maria Ferrari
Teleplay
Lee Aronsohn
Teleplay