Mystery Plane

John Trent

Tailspin Tommy Tompkins

Marjorie Reynolds

Betty Lou Barnes

Milburn Stone

Skeeter Milligan

Lucien Littlefield

Winslow

Tommy Bupp

Tommy (as a child)

Jason Robards Sr.

Paul Smith

George Lynn

'Brandy' Rand

Polly Ann Young

Anita

Betsy Gay

Betty Lou as a Young Girl

William P. Carleton

Navy Commander

John S. Peters

Henchman Carl

Sayre Dearing

Henchman Fred

Bruce Mitchell

Detective Captain Walker

Mickey Martin

Young Boy

Jerry Jerome

Henchman Joe

Pat Gleason

Detective

Cyril Ring

Henchman

Arthur Thalasso

Detective

John Elliott

Army Colonel