- John Seabourne Sr. directed the "Lobster Pot" scenes in the North Sea despite being seasick the whole time.
- One day Noel Coward visited the set and after seeing how the crew staged and wrapped up an elaborate sequence in about 2 hours decided to use most of them on his film In Which We Serve (1942).
- The model of Stuttgart used in the bombing raid was made by David Rawnsley at the Riverside Studio, Hammersmith and filmed by Freddie Ford.
- Actor Emrys Jones (Bob Ashley, wireless operator and footballer) was an international soccer player before the war. The character was made to be a footballer because he could already play well.
- The extra squadron members were all active members of the RAF (XVI) squadron.
- The film has no musical score at all (a rarity). The opening titles play over the sound of the bomber's engines.
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