An engineer is hired to plan and oversee the construction of a undersea tunnel between Europe and the US. However, certain interests don't want to see the tunnel built and use every means at their disposal, including sabotage and murder, to stop its construction.
| role | name |
|---|---|
| Mac Allen | Paul Hartmann |
| Hobby | Attila Hörbiger |
| Mary Allen | Olly von Flint |
| Bärmann | Otto Wernicke |
| Mr. Woolf - Tunnel Syndicate Director | Gustaf Gründgens |
| Mr. Lloyd - Financier | Max Weydner |
| Ethel Lloyd | Elga Brink |
| Gordon | Richard Ryen |
| Vandrstyfft | Georg Henrich |
| Chesterfield | Max Schreck |
| role | name |
|---|---|
| Director | Curtis Bernhardt |
| Writer | Bernhard Kellermann |
| Writer | Henry Koster |
| Writer | Reinhart Steinbicker |
| Producer | Ernst Garden |
| Composer | Walter Gronostay |
| Editor | Gottlieb Madl |
| Production designer | Heinz Fenchel |
| Production designer | Max Seefelder |
