Night Caller, The (1965)

aka’s: Blood Beast From Outer Space/
Night Caller From Outer Space

The inhabitants of Ganymede need to find mates from another world or they will become extinct. They soon discover a suitable breeding stock among the females of Planet Earth. Stars John Saxon, Maurice Denham and Patricia Haines.

This is the uncut UK version of Night Caller From Outer Space, also available here at Rare Movie Collector.