Sandy Descher
— Heidi
Douglas Fowley
— Alm Uncle
Van Dyke Parks
— Peter
Peter Capell
— Doc
Erik Jeide
— Ernst
Rolf Wanka
— Mr. Binder
Oswald Ursteins
— Carlo
Susan Sainio
— Clara
Karin Röse
— Louise
Harold Benedict
— Don
Clancy Cooper
— Dr. Roth
Paul McClintock
— Gen. Manby
Hap Hanson
— Col. Porter
C. Fowler
— Capt. McBee
Edwin Anderson
— Lt. Williams
Wadsworth Likely
— Sgt. Cory
Ted Mitchell
— Pilot
Dean Jackson
— Radio Operator