Day the World Ended (1955) was the fourth film directed by Roger Corman. Rick (Richard Denning) is a heroic scientist who, among others, must face off against a mutant monster (Paul Blaisdell) after an atomic war destroys human civilization. Chet Huntley of NBC, who later formed The Huntley-Brinkley Report, narrates.
The film is referred to in a 2001 horror film of the same title, The Day the World Ended.