Release Message:  Four astronauts returning from mankind's first mission to Mars enter a time warp and crash on a 26th Century Earth devastated by atomic war. Starring Hugh Marlowe.

Description:  Following their successful mission to Mars, four astronauts return to Earth via a time warp that throws them into the 26th Century. There, They find the planet ruined by nuclear war where they struggle with mutant Neanderthals and giant spiders. Astronauts returning from a voyage to mars are caught in a time warp and are propelled into a post-Apocalyptic Earth populated by mutants. Four astronauts returning from mankind's first mission to Mars enter a time warp and crash on a 26th Century Earth devastated by atomic war. Our heroes meet with hideous mutant cavemen, giant spiders, love-struck beauties in short dresses, and jealous old geezers in sparkly skullcaps as they struggle to save humanity and build a new world.