Episode Titles: Colonization
You are viewing a list of 1 The Big Bang Theory episode featuring "Colonization" in their title.
Season 8, Episode 17 - The Colonization Application
Aired March 5, 2015
As Sheldon and Amy take a step forward in their relationship and choose to buy a pet turtle, Amy is angered to learn that Sheldon has applied for a one-way mission to colonize Mars without discussing it with her.
Meanwhile, Leonard and Penny take a step forward in the bedroom when Leonard makes an adult purchase, while Raj worries about Emily's reaction when she finds out he's been snooping in her apartment.