The Big Bang Theory > Season 3 > Episode 15 (55)

The Large Hadron Collision

Airdate: 08.02.2010

Cast:

Johnny Galecki	...	Leonard Hofstadter
Jim Parsons	...	Sheldon Cooper
Kaley Cuoco	...	Penny
Simon Helberg	...	Howard Wolowitz
Kunal Nayyar	...	Raj Koothrappali
Erin Pickett	...	Cafeteria Patron

Crew:

Mark Cendrowski	...	Direction
Lee Aronsohn Richard Rosenstock Maria Ferrari	...	Script

Plot:

When Leonard is offered a trip to Switzerland on Valentine's Day to visit the CERN laboratory, Sheldon uses any and all means to be his guest instead of Penny.