Scent of Mystery is a 1960 mystery film that featured the one and only use of Smell-O-Vision, a system that timed odors to points in the film's plot. It was the first film in which aromas were integral to the story, providing important details to the audience. It was produced by Mike Todd, Jr., who in conjunction with his father Mike Todd had produced such spectacles as This is Cinerama and Around the World in Eighty Days.