Without Warning (1980)

Sandy and Greg are teenagers who go camping, despite warnings not to, with their friends. They soon encounter aliens, who are using the area as a hunting ground.

Directed by: Greydon Clark

Starring: Tarah Nutter, Christopher S. Nelson, Jack Palance, Martin Landau, Sue Ane Langdon, Neville Brand

Links: IMDb, Movie posters, Movie stills