NIGHT OF THE BLOOD BEAST (1958)

 This astronaut crash-lands his spaceship and ends up dead. Except that it turns out he's not really dead and has brought back some kinda mutating aliens, that look like Sea-Monkeys, in his blood and also one very ugly, big-headed, hulking alien/monster. The monster goes on to rip a scientist's head off and cause bad feelings all around.
 Produced by Roger's brother Gene Corman, this AIP monster-flick runs a little over an hour, which is a good thing since it's pretty basic and also pretty talky when our monster ain't around. The gestating-alien-thing is sort of a precursor to ALIEN minus the gory exploding out of bodies of course. Probably worth a watch if you like the old AIP monster flicks but there's a lot better ones to check out first. AKA THE CREATURE FROM GALAXY 27 and THE MONSTER FROM GALAXY 27