Episode Titles: Hadron
You are viewing a list of 1 The Big Bang Theory episode featuring "Hadron" in their title.
The Large Hadron Collision
Season 3, Episode 15 - 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 his mind.