- It is rumored that guards at each end of the Golden Gate Bridge were paid $500 each to stop cars for a minute to get footage of an empty bridge.
- The U.S. Department of Defense and the United States Navy declined to cooperate in the production of this film, including access to a nuclear-powered submarine, which forced the film production to use a non-nuclear, diesel-electric Royal Navy submarine, HMS Andrew.
- Fred Astaire launched his non-musical, dramatic acting career with this film.
- The movie was shot in part in Berwick, a (then) small town in the suburbs of Melbourne, Australia. Some streets which were being established during this time were named after people involved in the film. Some examples are: Gardner Street (Ava Gardner), Shute Avenue ('Neville Shute' ) and Kramer Drive (Stanley Kramer).
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