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, later of The Huntley-Brinkley Report, narrates.
The film is referred to in a 2001 horror film of the same title, The Day the World Ended. The film was remade in 1967 with the title In the Year 2889 with the dialogue repeated almost entirely verbatim.