What Would You Do? is an American situational hidden camera television series that has been broadcast on the American Broadcasting Company (ABC) since February 26, 2008. Created by Chris Whipple, the show with a social experiment format follows the reactions of passing strangers as they encounter conflict or illegal activity in a public setting, unaware that it is all staged and being recorded with hidden cameras. Throughout all of its seventeen seasons, the show has been hosted by news correspondent John Quiñones.

A hidden camera or spy camera is a camera used to photograph or record subjects, often people, without their knowledge. The camera may be considered "hidden" because it is not visible to the subject being filmed, or is disguised as another object. Hidden cameras are often considered a surveillance tool.