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.
as Comdr. Don Winslow
as Lieut. 'Red' Pennington
as Mercedes Colby
as Hirota
as Tasmia
as C.P.O. Ben Cobb
as Reichter
as Heilrich
as Mussanti
as The Scorpion
