'Argo,' 'Jaws,' 'The Terminal,' and more movies you won't believe were based on true stories

The creepy tale of the life and death of identical twin gynecologists Elliot and Beverly Mantle was inspired by the creepy deaths of Stewart and Cyril Marcus, identical twin gynecologists in New York. Their emaciated bodies were found in their apartment in 1975 -- they had each died of barbiturate withdrawal. Thankfully, the part about seriously disturbing gynecological instruments came from David Cronenberg's fevered imagination, not reality.