Kevin Conway
The Control Voice (voice) (uncredited)

Alex Diakun
Nicholas Prentice / Moses Saxon / Mr. Wilkes / Father Claridge / Minister / Quas...

Eric Schneider
Dr. Golden / Alien Inquisitor / High Commander Reese / The Voice / Triune / Dete...

Larry Musser
Jack Parsons / Detective Pete Button / Larry Leonard / Maj. Samuel Harbeck / Cle...

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

Scott Swanson
Reverend Leblanc / Silver-Haired Man / General Baker / Emil Dobkins / Kyle Halle...

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

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

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

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

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

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

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

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

Tom Heaton
Josiah Miller / Crazed Man / Red / Jim

William deVry
Ben / Craig Swenson / Bartender

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

Mark Gibbon
Bailiff / Male Vorak / Overseer #2

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

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