Jaap van Leyden is in charge of a shipyard in newly occupied Holland. At first he collaborates with the Germans because it is the easiest course to follow. Later a child's rhyme reminds him of his patriotic duty, but how best to resist the Nazis without endangering his wife and fellow workers?
| Writing | Gordon Wellesley | Writer |
| Directing | Vernon Sewell | Director |
| Editing | Michael C. Chorlton | Editor |
| Sound | John Dennis | Sound |
| Art | Alfred Junge | Production Design |
| Crew | Eric Humphriss | Special Effects |
| Sound | Desmond Dew | Sound |
| Production | Ralph Richardson | Associate Producer |
| Production | Michael Powell | Producer |
| Directing | Gordon Wellesley | Director |
| Writing | Emeric Pressburger | Story |
| Production | Emeric Pressburger | Producer |
| Sound | Allan Gray | Original Music Composer |
| Writing | Vernon Sewell | Writer |
| Production | George Maynard | Production Manager |
| Directing | Denis Kavanagh | Assistant Director |
| Camera | Erwin Hillier | Director of Photography |
| Camera | Cecil Cooney | Camera Operator |