Warren Hull

Mandrake the Magician

Doris Weston

Betty Houston

Al Kikume

Lothar

Rex Downing

Tommy Houston

Edward Earle

Dr. Andre Bennett

Forbes Murray

Professor Houston

Kenneth MacDonald

James Webster

Don Beddoe

Frank Raymond

Dick Curtis

Dorgan

John Tyrrell

Dirk

Stanley Brown

Green

Robert Sterling

Henchman

Sam Ash

George Regan

Lester Dorr

Gray

Ernie Adams

Brown

Eddie Fetherston

Rest Home Henchman

Knox Manning

Narrator

Harry Bernard

Construction Camp Watchman

Stanley Blystone

Henchman CX12

Budd Buster

Construction Camp Henchman

George Chesebro

Baker

Charles Dorety

Mill River Inn Henchman

Kit Guard

Powerhouse Henchman

Frank Hagney

Harris

Tom London

Mill River Inn Henchman

Frank Mills

Gas Station Hitman

Art Mix

Ironworks Henchman

Eddie Parker

Henchman

Ralph Peters

Mohawk Steward-Henchman

Cyril Ring

Magic Mart Henchman

Cy Schindell

Bank Henchman

Charles Sherlock

Ship Henchman

Reginald Simpson

Parsons

Charles Sullivan

Henchman-Driver

Harry Tenbrook

Streeter

Blackie Whiteford

Construction Camp Henchman

Steve Clark

Henchman (uncredited)