David Vincent
Stan Arthur / Edgar Scoville
Major Rick Graves / Michael Tressider
Sherri Vikor / Ellie Markham
Narrator (voice) (uncredited)
Vice Chancellor Pierre Alquist / Magnus
Col. Archie Harmon / Fellows
Dr. Malcolm Gantley / Maj. Pete Stanhope
Bob Torin / Tony LaCava
Guard / Policeman
Police Sergeant / Brother John
Brother James / Gen. Cullenbine
Sheriff Lou Carver / Jim Bryce
Lt. Rawlings / Guard
Deputy / Sergeant
Juror (uncredited) / Alien (uncredited)
Alien (uncredited) / Bartender / Alien (uncredited)
Alien Pilot / Trooper
Mama / Maid
Allen Slater / Dr. Mailer
Joe Manners / Man
Sergeant / Cobbs
Capt. Mitchell Ross / John Carter
Alien / Carr
