A drive in movie
A series of decapitations on a Swiss mountainside appear to be connected to a mysterious radioactive cloud.
Director: Quentin Lawrence
Writers: Jimmy Sangster (screenplay), Peter Key (story)
Stars: Forrest Tucker, Laurence Payne, Jennifer Jayne
https://ffilms.org/the-crawling-eye-1958/
Warning if you go to that site you may kill hours of time. Hundreds of full length movies sorted by decade or genre.