"Mandrake and his team attempt to prevent "The Wasp" from stealing and using a new Radium invention."
Warren Hull
as Mandrake the Magician
Doris Weston
as Betty Houston
Al Kikume
as Lothar
Rex Downing
as Tommy Houston
Edward Earle
as Dr. Andre Bennett
Forbes Murray
as Professor Houston
Kenneth MacDonald
as James Webster
Don Beddoe
as Frank Raymond
Dick Curtis
as Dorgan
John Tyrrell
as Dirk
Stanley Brown
as Green
Beatrice Curtis
as Rest Home Nurse
Robert Sterling
as Henchman
Sam Ash
as George Regan
Lester Dorr
as Gray
Ernie Adams
as Brown
Eddie Fetherston
as Rest Home Henchman
Eddie Foster
as Ed
Knox Manning
as Narrator
Ernie Alexander
as Cabbie
Harry Bernard
as Construction Camp Watchman
Stanley Blystone
as Henchman CX12
Buel Bryant
as Rest Home & Ironworks Henchman
Budd Buster
as Construction Camp Henchman
George Chesebro
as Baker
Charles Dorety
as Mill River Inn Henchman
Jerry Frank
as Harper Drive Henchman
Kit Guard
as Powerhouse Henchman
Frank Hagney
as Harris
Chuck Hamilton
as Bank Henchman
Eddie Hart
as Williams
Oscar 'Dutch' Hendrian
Jerry Jerome
as Ward
Eddie Laughton
as Kidnapping Henchman
Tom London
Stanley Mack
as Roadster Henchman
Pat McKee
as Dam Henchman
Charles McMurphy
as Construction Foreman
Frank Mills
as Gas Station Hitman
Art Mix
as Ironworks Henchman
Eddie Parker
Ralph Peters
as Mohawk Steward-Henchman
Rose Plumer
as Ship Passenger
Cyril Ring
as Magic Mart Henchman
Cy Schindell
Charles Sherlock
as Ship Henchman
Reginald Simpson
as Parsons
Tom Steele
Charles Sullivan
as Henchman-Driver
Harry Tenbrook
as Streeter
George Turner
as Apartment-Raider
Frank Wayne
Blackie Whiteford
Bud Wolfe
as Tower Henchman
Bert Young
Steve Clark
as Henchman (uncredited)
Norman Deming
Director
Stunts
Joseph F. Poland
Screenplay
Basil Dickey
Sam Nelson
Jack Fier
Producer
Jerry Thoms
Editor
George DeNormand
Richard Fantl
Ned Dandy
Benjamin H. Kline
Director of Photography
Floyd Morgan
Original Music Composer
Morris Stoloff
Music Director
Sidney Cutner
