John Carradine
Cosmic Man
Bruce Bennett
Dr. Karl Sorenson
Angela Greene
Kathy Grant
Paul Langton
Col. Matthews
Scotty Morrow
Ken Grant
Lyn Osborn
Sgt. Gray
Walter Maslow
Dr. "Rich" Richie
Herbert Lytton
Gen. Knowland
Ken Clayton
Master Sergeant
Harry Fleer
Bill, the Park Ranger
John Erman
Radar Operator
Dwight Brooks
Major
Hal Torey
Dr. Steinholtz
Alan Wells
Sergeant