Warren Hull

Character: Mandrake the Magician

Doris Weston

Character: Betty Houston

Al Kikume

Character: Lothar

Rex Downing

Character: Tommy Houston

Edward Earle

Character: Dr. Andre Bennett

Forbes Murray

Character: Professor Houston

Kenneth MacDonald

Character: James Webster

Don Beddoe

Character: Frank Raymond

Dick Curtis

Character: Dorgan

John Tyrrell

Character: Dirk

Stanley Brown

Character: Green

Beatrice Curtis

Character: Rest Home Nurse

Robert Sterling

Character: Henchman

Sam Ash

Character: George Regan

Lester Dorr

Character: Gray

Ernie Adams

Character: Brown

Eddie Fetherston

Character: Rest Home Henchman

Eddie Foster

Character: Ed

Knox Manning

Character: Narrator

Ernie Alexander

Character: Cabbie

Harry Bernard

Character: Construction Camp Watchman

Stanley Blystone

Character: Henchman CX12

Buel Bryant

Character: Rest Home & Ironworks Henchman

Budd Buster

Character: Construction Camp Henchman

George Chesebro

Character: Baker

Charles Dorety

Character: Mill River Inn Henchman

Jerry Frank

Character: Harper Drive Henchman

Kit Guard

Character: Powerhouse Henchman

Frank Hagney

Character: Harris

Chuck Hamilton

Character: Bank Henchman

Eddie Hart

Character: Williams

Oscar 'Dutch' Hendrian

Character: Powerhouse Henchman

Jerry Jerome

Character: Ward

Eddie Laughton

Character: Kidnapping Henchman

Tom London

Character: Mill River Inn Henchman

Stanley Mack

Character: Roadster Henchman

Pat McKee

Character: Dam Henchman

Charles McMurphy

Character: Construction Foreman

Frank Mills

Character: Gas Station Hitman

Art Mix

Character: Ironworks Henchman

Eddie Parker

Character: Henchman

Ralph Peters

Character: Mohawk Steward-Henchman

Rose Plumer

Character: Ship Passenger

Cyril Ring

Character: Magic Mart Henchman

Cy Schindell

Character: Bank Henchman

Charles Sherlock

Character: Ship Henchman

Reginald Simpson

Character: Parsons

Tom Steele

Character: Powerhouse Henchman

Charles Sullivan

Character: Henchman-Driver

Harry Tenbrook

Character: Streeter

George Turner

Character: Apartment-Raider

Frank Wayne

Character: Henchman

Blackie Whiteford

Character: Construction Camp Henchman

Bud Wolfe

Character: Tower Henchman

Bert Young

Character: Rest Home Henchman

Steve Clark

Character: Henchman (uncredited)