Debbie Thureson as Nancy

Steve Bond as Joel

Lori Lethin as Bobbie

Robert Wald as Skip

Gayle Gannes as Gail

Philip Wenckus as Greg

Jackson Bostwick as Mark O'Brien

Jackie Coogan as Lester Tile

Connie Hunter as Mary Sylvester

Ted Hayden as Frank Sylvester

Garry Goodrow as Sgt. Parsons

Carel Struycken as The Monster

Eric Edwards as Misha (uncredited)

Arcadia Lake as Sasha (uncredited)

John Leslie as Marco (uncredited)