Missing is a 1982 American biographical thriller drama film directed by Costa-Gavras from a screenplay written by Gavras and Donald E. Stewart, adapted from the book The Execution of Charles Horman: An American Sacrifice (1978) by Thomas Hauser, based on the disappearance of American journalist Charles Horman, in the aftermath of the Chilean coup of 1973, which deposed the democratically elected socialist President Salvador Allende.