The Body Stealers

In this 1969 British sci-fi horror film, a mysterious red-beam is snatching NATO paratroopers out of the air during routine jumps, leaving investigators to unravel an alien plot to steal human bodies. The story follows two investigators as they uncover the truth behind the disappearances, which lead them to a shocking revelation about the fate of the missing troopers and their connection to an extraterrestrial invasion.