World Without End 1956

Four astronauts returning from man's first mission to Mars enter a time warp and crash on a 26th Century Earth devastated by atomic war. At first unaware where they are, but finding the atmosphere safe to breathe, they start exploring and find themselves in a divided future where disfigured mutants living like cavemen inhabit the surface, while the normals live comfortably below the surface but are dying as a race from lack of natural water, air and sunlight.

Cast:

Strother Martin
Nihka (uncredited) 

Rod Taylor
Herbert Ellis 

Paul Brinegar
Vida (uncredited) 

Christopher Dark
Henry Jaffe 

Mimi Gibson
Ginny Jaffe (uncredited) 

Nelson Leigh
Dr Eldon Galbraithe