Episode Titles: Obligation
You are viewing a list of 1 The Big Bang Theory episode featuring "Obligation" in their title.
Season 6, Episode 18 - The Contractual Obligation Implementation
Aired March 7, 2013
Leonard, Sheldon and Howard visit Howard's old school to speak to junior high girls about careers in science. Meanwhile, Raj plans his first formal date with Lucy, while the girls visit Disneyland and dress up as Disney princesses.