Donald Woods

Captain Bob Dayton

Kathryn Adams

Mary Blake

Robert Armstrong

Lieutenant Ed Carey

Eduardo Ciannelli

Felix Lynx

Jacqueline Dalya

Innis Clair

Billy Halop

Tim Bryant

Reed Hadley

Caddens

Irving Mitchell

R.S. Hinchfield

Edgar Edwards

Henchman Teal [Chs. 3-6]

John Holland

Henchman Hess

Roy Gordon

Maj. Gen. Fletcher [Chs. 1-2, 4, 11-12]

Alex Callam

Capt. Long [Chs. 1-2, 4, 11-12]

Phil Warren

Bakeman [Ch. 4] (as Philip Warren)

Bill Cody Jr.

Jack Hurd

Ford Beebe

Ray Taylor