Paul Kelly as Lt. Dan Barton / The Black Commando

Anne Nagel as Jean Ashley

Trevor Bardette as Jensen

Rudolph Anders as Rudi Thysson

Clancy Cooper as Det. Sgt. Pat Flanagan

Gregory Gaye as Nazi Agent Feldon

Ludwig Donath as Nazi Prof. Metzger

Beal Wong as Quito

Eddie Parker as Chief Henchman Berck

Wade Boteler as Police Chief Burns

Charles C. Wilson as Desk Sgt. Cullen

Alex Callam as Investigator Hogan

Robert Fiske as Investigator Ryan

Selmer Jackson as Maj. Henry Barton

Jacqueline Dalya as Linda

Jack Gardner as F. Wolper

Kenne Duncan as Marvin

George Lynn as Chief Stover

Frank Shannon as Police Commissioner

Gus Glassmire as Mr. Stevens

John Elliott as Prof. Clyde

Jack Rice as Fred, Jensen's Clerk

Sigfrid Tor as Lt. Kurtz

Joseph W. Girard as Col. Drake

Dick Botiller as Hans Steufel

Lucien Prival as U-499 Commander

Rose Plumer as Flower Woman Spy

Lester Dorr as Otto Stahl

Peter Leeds as Henchman Carl Hiecke

Kit Guard as Henchman Corrick

Warren Jackson as Ralph

Henry Lysing as Code Lessons

Lee Shumway as Police Dispatcher

Roy Brent as The Military Policeman

Stanley Brown as Police Lab Technician

Joe Caits as Messenger

Ken Carpenter as Newscaster

Steve Clark as Nazi Agent

Joseph Crehan as Police Chief Henry Burns

Eddie Dunn as Weather Bureau Man

Franklyn Farnum as Federal Agent

Eddie Gribbon as First Mate

Chuck Hamilton as Henchman

Jack Hendricks as Henchman

Eddie Kane as Coffee Shop Counterman

Frank LaRue as Weather Bureau Man

Tom London as Weather Bureau Guard

Knox Manning as Narrator

Ted Mapes as Nazi Agent

Frank McCarroll as Military Policeman

James Millican as Reporter Bill

Zon Murray as Military Policeman

Edward Peil Sr. as Policeman

Lee Phelps as Jailer

Eddie Polo as Special Delivery Messenger

Dick Rush as Policeman

Tom Steele as Federal Agent

Bobby Stone as Newsboy

Harry Strang as Henchman

Charles Sullivan as Truck Driver

Wally West as Policeman

Eddie Woods as Henchman Kurt

Bert Young as Henchman