Jason Lively as Christopher 'Chris' Romero

Steve Marshall as James Carpenter 'J.C.' Hooper

Jill Whitlow as Cynthia 'Cindy' Cronenberg

Tom Atkins as Det. Ray Cameron

Wally Taylor as Detective Landis

Allan Kayser as Brad

Bruce Solomon as Sgt. Raimi

Vic Polizos as Coroner

Dick Miller as Walt

Ken Heron as Johnny

Alice Cadogan as Pam

June Harris as Karen

David Paymer as Young Scientist

David Oliver as Steve

Evelyne Smith as House Mother

Leslie Ryan as Sorority Girl with Hairbrush

Suzanne Snyder as Lisa

Elizabeth Cox as Kathy

John J. York as Todd

Robert Kerman as Patrolman with Searchlight

Earl Ellis as Beta Zombie

Robert Kurtzman as Beta Zombie

Howard Berger as Beta Zombie

Daniel Frishman as Alien Zombie

Greg Nicotero as Extra (uncredited)

Dave Alan Johnson as Young Ray Cameron

Jim Townsend as Chett

Lori Lively as Lori

Kevin Thompson as Alien Pursuer #1

Joseph S. Griffo as Alien Pursuer #2

Jay Arlen Jones as Cop in Station

Elizabeth Alda as Alley Cop

Craig Schaefer as Irksome Cop at Cryogenics Lab

Robert Kino as Mr. Miner

Chris Tashima as Extra (uncredited)