Episode Titles: Collision
You are viewing a list of 3 The Big Bang Theory episodes featuring "Collision" 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.
The Property Division Collision
Season 10, Episode 10 - Aired December 1, 2016
Sheldon and Leonard end up in a bitter tit-for-tat fight when they try to divvy up their mutually owned belongings from Apartment 4A. Meanwhile, Raj and Stuart compete to be the most helpful to Bernadette in her final weeks of pregnancy.
The Planetarium Collision
Season 12, Episode 5 - Aired October 18, 2018
When Sheldon feels that Amy's job isn't leaving her enough time to work with him on super-asymmetry, he goes behind her back and unwittingly sabotages her career in the process. Meanwhile, Raj is unhappy at the prospect of Howard joining him in hosting a show at the planetarium.