Theremin: An Electronic Odyssey is a 1993 documentary film by Steven M. Martin about the life of Léon Theremin and his invention, the theremin, a pioneering electronic musical instrument. It follows his life, including being imprisoned in a Soviet Gulag, and the influence of his instrument, which came to define the sound of eerie in 20th-century films, and influenced popular music as it searched for and celebrated electronic music in the 1960s. It was first broadcast on November 2, 1993 (coincidentally, one day before Theremin's death) as a special edition of Channel 4's Without Walls arts strand.