Night of the Blood Beast (1958 Sci-Fi) Moonlit carnage. Creature unleashed. No escape.

An astronaut crashes back to Earth—dead. But surprise! His body is now seeded with rapidly gestating alien embryos. Cue a team of scientists (including his fiancée) battling a bloodsucking space monster with a very proactive approach to interspecies diplomacy. No girl was safe as long as this head-hunting thing roamed the land!