Lt. Col. John Teasdale
Lab Technician
Dr. McCandless
Dr. Ramsay
A Patrolman
Sanatorium Attendant (uncredited)
Doctor in Operating Room
Tony's Doctor (uncredited)
Commander
Sheriff Gibbons
Referee
Mr. Perrins
Klaus
Tom Cleveland
Dr. Paul Florino
Desk Clerk
Pilot Billy
Dr. Hunt
Abrom
Prof. Andrew Whitsett
Businessman
The Captain
Chief Peck
Alien
Mueller
Carr
Raskov
Provost Marshall Ross
William Goslin