Kevin Conway
The Control Voice (voice) (uncredited)

Alex Diakun
Nicholas Prentice / Shopkeeper / Mr. Wilkes / Father Claridge / Minister / Quasg...

Eric Schneider
Dr. Golden / Dr. Stanley Miller / High Commander Reese / The Voice / Triune / Dr...

Larry Musser
Clerk / Maj. Samuel Harbeck / Jack Parsons / Dr. Evan Swift / Detective Pete But...

Garvin Cross
Lt. Jackson / R & R Leader / Ralph Sutton / Officer #1 / Hawkes / Agent Bauer

Scott Swanson
General Baker / Silver-Haired Man / Kyle Haller / Reverend Leblanc / Emil Dobkin...

Tom Butler
Mr. Evans / Dr. Werner / General Morehouse / Charlie Rogers / Charlie Bouton

Nathaniel DeVeaux
Security Captain / Don Hattaway / Roger Cress / Col. Birch / Captain

Kavan Smith
Dominic Langton / Allan / Quarterback / Lt. O'Neill / Harrison Taylor

Andrew Airlie
F.B.I. Agent Corey Lonn / Jonathan Morris / Don / Dr. Kevington / Marcus Fellows

Bruce Harwood
Miles Pendergast / Dr. Norris / Technician / Dr. Avery Strong

Barry W. Levy
Jules Mason / David Cohen / Vila / Colonel Bell

Robert Lewis
Miguel / Jake Sternlight / Gould / Commander Guy LeClerc

Joanna Piros
TV Interviewer / TV Newscaster / Reporter #1 / News Anchor

Tom Heaton
Crazed Man / Josiah Miller / Red / Jim

William deVry
Ben / Craig Swenson / Bartender

Benz Antoine
Sergeant / Larue / Security Guard #1 / Fence Guard

Mark Gibbon
Bailiff / Male Vorak / Overseer #2

Frank C. Turner
Mikulak / Elder / Old Man / Luther

Scott Hylands
Col. Roger Tennent / Governor Oleaga / Dr. Howard Sarrazin / Wayne