Sheldon, Howard, and Leonard give a presentation about careers in science to a group of girls in junior high on The Big Bang Theory. "The Contractual Obligation Implementation" is the 18th episode of the shows sixth season.
James Earl Jones: Why don't you and your friends come to Comic-Con with me? Sheldon: Really? James Earl Jones: Of course. And San Diego is right across the border from my favorite city on Earth, Tijuana.... where I'm taking you every night! Sheldon: Ay-yi-yi. James Earl Jones: Ay-yi-yi. Bang. Bang.