Michael Powell's golden cocker spaniels Erik and Spangle make their first appearance on film at the house of the aunt of Mrs. Sorensen.
The first film that Deborah Kerr worked on. She played a cigarette girl in one of the nightclubs visited. But although she impressed everyone, her scene ended up on the cutting room floor.
When Michael Powell and the crew went on location to Ramsgate (Eastgate in the film), they sent all their luggage and equipment in cases boldly marked "Contraband". Luckily the local wartime Contraband Controllers saw the funny side and when they arrived at the hotel they found their cases had stamps and stencils all over them saying things like "Explosives", "Examined", "Condemned".