William Leslie
Dr. David Conway
Kathryn Grant
Laura 'Hutch' Hutchinson
Tris Coffin
Dr. Ellis Morton
Raymond Greenleaf
Gov. Chaney
Frank J. Scannell
Sheriff Quinn
Charles Evans
Gen. Bortes
Marshall Reed
General's Aide
Terry Frost
Chief Rescue Worker
Paul Savage
Ranger Kirk
Fred Coby
Ranger Brown
David Armstrong
Military Policeman (uncredited)
