Without Warning centers on a pair of teenagers named Sandy and Greg, who go camping with their friends, despite warnings not to. The group encounters aliens that are using the area as a hunting ground. Directed by Greydon Clark, Without Warning stars Jack Palance, Martin Landau, Tarah Nutter, Darby Hinton, Christopher S. Nelson, Cameron Mitchell, Neville Brand, Sue Ane Langdon, Ralph Meeker, Larry Storch, Lynn Theel, David Caruso and Kevin Peter Hall.