A tense WWI spy thriller in which Colonel Duncan Grant (British star Brian Aherne, in his first talking role), parachutes into Germany to gather intelligence on the enemy’s secret ‘W Plan’ and to assist Allied POWs in digging escape tunnels.
| Crew | D.F. Scanlon | Sound Recordist |
| Production | Victor Saville | Producer |
| Directing | Marjorie Gaffney | Assistant Director |
| Art | Hugh Gee | Art Direction |
| Writing | Miles Malleson | Writer |
| Editing | Maclean Rogers | Editor |
| Writing | Frank Launder | Writer |
| Directing | Victor Saville | Director |
| Writing | Victor Saville | Writer |
| Camera | Werner Brandes | Director of Photography |
| Camera | Freddie Young | Director of Photography |
| Writing | Graham Seton | Novel |
| Sound | John Reynders | Original Music Composer |
| Camera | René Guissart | Director of Photography |