Melinda Clarke

Character: Julie Walker (as Mindy Clarke)

J. Trevor Edmond

Character: Curt Reynolds

Kent McCord

Character: Col. John Reynolds

Sarah Douglas

Character: Lt. Col. Sinclair

James T. Callahan

Character: Col. Peck

Basil Wallace

Character: Riverman

Mike Moroff

Character: Santos

Julian Scott Urena

Character: Mogo

Pía Reyes

Character: Alicia (as Pia Reyes)

Sal Lopez

Character: Felipe

Dana Lee

Character: Store Owner

Jill Andre

Character: Dr. Beers

Abigail Lenz

Character: Mindy

David Wells

Character: Laboratory Technician

Anthony Hickox

Character: Dr. Hickox

Brian Peck

Character: Ballistics Technician

Gary Schmoeller

Character: Base Captain

Michael Deak

Character: Cop #1

Clarence Epperson

Character: Cadaver

Michael Decker

Character: Science Technician

Billy Kane

Character: Sentry

Michael Northern

Character: Squad Soldier

Joe Sikorra

Character: Squad Leader

Rob Hampton

Character: Barrel Corpse (uncredited)

Gerry Lively

Character: Quartermaster (uncredited)

John Penney

Character: Sergeant (uncredited)