Horror of the Blood Monsters

In the near future with a intergalactic vampire plague threatening earth, an expedition is sent to a distant galaxy in hopes of discovering the plague's source. Landing on a mysterious planet they discover that Spectrum radiation has turned the atmosphere into a one-color tint. Exploring further, the group discovers living dinosaurs, a race of vampire cavemen, and other strange creatures.

Horror of the Blood Monsters is a 1974 adventure horror movie directed by Al Adamson, starring John Carradine, Joey Benson, Robert Dix. It holds an IMDb rating of 3.1/10 from 1,197 votes and runs 1h 25m.