Episode Titles: Instability
You are viewing a list of 1 The Big Bang Theory episode featuring "Instability" in their title.
The Killer Robot Instability
Season 2, Episode 12 - Aired January 12, 2009
When another one of Howard's unwanted advances on Penny leads her to spurn him, Howard falls into a depressed funk. Wolowitz's absence deprives the guys of their star engineer as they work on their robot for an upcoming killer robot contest.