Thunder Birds

Preston Foster

Steve Britt

John Sutton

Peter Stackhouse

Gene Tierney

Kay Saunders

Jack Holt

Colonel MacDonald

May Whitty

Lady Jane Stackhouse

George Barbier

Col. Cyrus P. 'Gramps' Saunders

Richard Haydn

George Lockwood

Reginald Denny

Barrett

Ted North

Cadet Hackzell

Janis Carter

Blonde Red Cross Nurse Trainee

C. Montague Shaw

Doctor

Viola Moore

Nurse

Nana Bryant

Mrs. Blake

Joyce Compton

Saleswoman

Bess Flowers

Nurse

Selmer Jackson

Bit role

Charles Tannen

American Flyer / Opening Off-Screen Narrator (voice)

Harry Strang

Forest Ranger

Walter Tetley

Messenger Boy

Walter Tetley

Red Cross Nurse Trainee (uncredited)