Don Winslow of the Navy

Don Terry

Cmdr. Don Winslow

Claire Dodd

Mercedes Colby

John Litel

Spencer Merlin

Walter Sande

Lt. Red Pennington

Anne Nagel

Misty Gaye

Wade Boteler

Mike Splendor

Ben Taggart

John Blake

John Holland

Paul Barsac

Lane Chandler

Henchman Corley

Ethan Laidlaw

Henchman Spike

Peter Leeds

Seaman Chapman

Robert Barron

Henchman Prindle

Kurt Katch

The Scorpion

Ray Teal

Gang Radioman Barker

Dirk Thane

Lt. Cdr. Grady

Herbert Rawlinson

Admiral Warburton [Ch. 1]

Samuel S. Hinds

The CINCUS [Ch. 1]

Kenneth Harlan

Capt. Holding [Ch. 1]

Arthur Loft

Enemy Sub Capt. Tranker [Ch. 1]

Paul Scott

Capt. Fairfield, of the "Batavia" [Chs. 1-2]

Ford Beebe

Director

Paul Huston

Screenplay