Craig Stevens
Col. Joe Parkman
Acting
William Hopper
Dr. Nedrick 'Ned' Jackson
Acting
Alix Talton
Marge Blaine
Acting
Donald Randolph
Gen. Mark Ford
Acting
Florenz Ames
Prof. Anton Gunther
Acting
Paul Smith
Corporal
Acting
Paul Campbell
Lt. Fred Pizar
Acting
Pat Conway
Sgt. Pete Allen
Acting
Phil Harvey
Lou
Acting
Helen Jay
Mrs. Farley
Acting
Bing Russell
State Trooper
Acting
David McMahon
Capt. Frank Carver
Acting
Marvin Miller
Narrator (voice)
Acting
Michael Forest
Photographer (uncredited)
Acting
Sumner Williams
C-47 Pilot (uncredited)
Acting