When an intergalactic vampire plague threatens Earth, a desperate expedition ventures into a distant galaxy to find its origin. Upon landing on an alien world bathed in eerie Spectrum radiation, the team encounters prehistoric dinosaurs and a sinister race of vampire cavemen. Directed by Al Adamson and written by Sue McNair, this sci-fi horror classic stars John Carradine, Robert Dix, and Vicki Volante in a thrilling battle for survival against otherworldly terrors.