Director/a
Fred F. Sears
DIRECTOR/A
Reparto (por orden de créditos)
Kathryn Grant
Laura Hutchinson
William Leslie
Dr. David Conway
Tristram Coffin
Dr. Ellis Morton
Raymond Greenleaf
Gov. Chaney
Charles Evans
Gen. Bortes
Frank J. Scannell
Sheriff Quinn
Marshall Reed
General's Aide
Fred Coby
Ranger Brown
Paul Savage
Ranger Kirk
Terry Frost
Chief Rescue Worker
Richard Alexander
Workmanuncredited
Leon Alton
Scientistuncredited
David Armstrong
Military Policemanuncredited
Paul Bradley
John Close
Soldieruncredited
Oliver Cross
Roy Damron
Rangeruncredited
Dan Dowling
George Ford
Plant Workeruncredited
James Gonzalez
Herschel Graham
Sam Harris
Governor's Board Memberuncredited
Robert Kino
Ethan Laidlaw
Lyle Latell
Civil Defense Chief Carsonuncredited
Perk Lazelle
Pierce Lyden
Chief Rangeruncredited
Philo McCullough
Paul McGuire
Reporteruncredited
Gerald Mohr
Narratoruncredited
Dennis Moore
Radio Communications Manuncredited
Charles Morton
Sol Murgi
John Phillips
Governor's Secretaryuncredited
Narratoruncredited,voice
Natividad Vacío
Hospital Physicianuncredited
Otto Waldis
Professor Hagstromuncredited
John Zaremba
Daniel J. Wintersuncredited