Tarah Nutter as Sandy

Christopher S. Nelson as Greg

Jack Palance as Joe Taylor

Martin Landau as Fred 'Sarge' Dobbs

Sue Ane Langdon as Aggie

Neville Brand as Leo

Cameron Mitchell as Hunter

Darby Hinton as Randy

David Caruso as Tom

Kevin Peter Hall as The Alien

Lynn Theel as Beth

Larry Storch as Scoutmaster

Ralph Meeker as Dave

Mark Ness as Bill, pool shooter

Burt Davis as Old Man At Bar

Jeffrey Sudzin as Ambulance Driver