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.
Bernadette: I had a plan. I kept leaving Dove bar wrappers around to explain any weight gain. Amy: Where did you get empty Dove bar wrappers? Bernadette: From all the DOVE BARS I ATE. I'M PREGNANT. Try to keep up!