Based on a true incident that occurred in 1942 when nine Nazi saboteurs were put ashore on the coast of Long Island, New York, by submarine, with orders to blow up various defense installations.
| Actor | Role |
|---|---|
 George SandersCarl Steelman / Ernst Reiter | Carl Steelman / Ernst Reiter |
 Ward BondFBI Chief Craig | FBI Chief Craig |
 Anna StenFrau Reiter | Frau Reiter |
 Dennis HoeyCol. Taeger | Col. Taeger |
 Sig RumanDr. Herman Holger | Dr. Herman Holger |
| LLudwig StösselPapa Julius Steelman | Papa Julius Steelman |
 Robert BarratCapt. Kranz | Capt. Kranz |
 Poldi DurHelga Lorenz (as Poldy Dur) | Helga Lorenz (as Poldy Dur) |
 Ralph ByrdBurkhardt | Burkhardt |
 Elsa JanssenMama Henrietta Steelman | Mama Henrietta Steelman |
 Rex WilliamsEichner | Eichner |
 Charles McGrawZellerbach | Zellerbach |
 Sven Hugo BorgCmdr. Ullrich Hauser | Cmdr. Ullrich Hauser |
 Kurt KatchSchonzeit | Schonzeit |
 Otto ReichowAdam, S.S. Trooper | Adam, S.S. Trooper |
 John BannerGestapo Agent | Gestapo Agent |
 Ruth BradySecretary | Secretary |
 Etta McDanielTheresa | Theresa |