Episode Titles: Large
You are viewing a list of 1 The Big Bang Theory episode featuring "Large" in their title.
Season 3, Episode 15 - The Large Hadron Collision
Aired February 8, 2010
When Leonard gets the opportunity to visit CERN's Large Hadron Collider in Switzerland on Valentine's Day, he decides to take Penny with him as his guest. Sheldon, of course, believes he should be the one to go on the trip with Leonard and starts a campaign to change Leonard's mind.