Lots of slogans such as "Be like Dad, Keep Mum" and "Keep it under your Hat" are visible on the walls in various scenes to reinforce the plot of this British wartime movie illustrating how gossipy talk can result in unknowingly giving valuable information to Nazi spies.
Thorold Dickinson | Director |
Michael Balcon | Producer |
Ernest Irving | Music Director |
Basil Bartlett | Writer |
Angus MacPhail | Writer |
Ray Pitt | Editor |
Ernest Palmer | Director of Photography |
Thomas N. Morahan | Art Direction |
Thorold Dickinson | Writer |
John Dighton | Writer |