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