The Big Bang Theory

The Colonization Application

Aired Mar 5, 2015 · 8:00 PM ET · 25 min

Trouble arises when Amy learns Sheldon has applied for a one-way mission to colonize Mars. Also, a trip to the pet store ends in a fight for Sheldon and Amy, Leonard surprises Penny with a very “adult” purchase, and Raj is caught snooping in Emily’s apartment.