Melinda Clarke as Julie Walker (as Mindy Clarke)

J. Trevor Edmond as Curt Reynolds

Kent McCord as Col. John Reynolds

Sarah Douglas as Lt. Col. Sinclair

James T. Callahan as Col. Peck

Basil Wallace as Riverman

Mike Moroff as Santos

Julian Scott Urena as Mogo

Pía Reyes as Alicia

Sal Lopez as Felipe

Dana Lee as Store Owner

Jill Andre as Dr. Beers

Abigail Lenz as Mindy

David Wells as Laboratory Technician

Anthony Hickox as Dr. Hickox

Brian Peck as Ballistics Technician

Gary Schmoeller as Base Captain

Michael Deak as Cop #1

Clarence Epperson as Cadaver

Michael Decker as Science Technician

Billy Kane as Sentry

Michael Northern as Squad Soldier

Joe Sikorra as Squad Leader

Rob Hampton as Barrel Corpse (uncredited)

Gerry Lively as Quartermaster (uncredited)

John Penney as Sergeant (uncredited)