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.
Where to watch US
Not streaming in US right now.
On location
The cast
A
Top billing shown. Full cast and crew on IMDB ↗
