"Don Winslow (titular hero of the serial "Don Winslow of the Navy") is reassigned to the United States Coast Guard, to guard the coast against saboteurs and sneak attacks."
Don Terry
as Comdr. Don Winslow
Walter Sande
as Lieut. 'Red' Pennington
Elyse Knox
as Mercedes Colby
Philip Ahn
as Hirota
June Duprez
as Tasmia
Edgar Dearing
as C.P.O. Ben Cobb
Lionel Royce
as Reichter
Henry Victor
as Heilrich
Charles Wagenheim
as Mussanti
Nestor Paiva
as The Scorpion
Paul Huston
Screenplay
Griffin Jay
George H. Plympton
Richard Brooks
Additional Dialogue
Ralph M. DeLacy
Art Direction
Hans J. Salter
Music Director
Saul A. Goodkind
Supervising Editor
Alvin Todd
Editor
Irving Birnbaum
Edgar Zane
Henry McRae
Producer
Lewis D. Collins
Director
Ray Taylor
John W. Boyle
Director of Photography
William A. Sickner