Trivia / Watch Your Stern

• Blooper: "Refrigeration" is misspelt as "Refridgeration" on the cool room plans.
• Completely Different Title:
  • Denmark: It's Crazy About the Torpedo, Sailor.
  • Finland: It's Best to Laugh....
  • Germany: That's Crazy - Our Torpedo is Coming Back.
  • Greece: Spies at the Admiralty.
  • Hungary: The Torpedo Returns.
  • Sweden: It Just Laughs....
• Deleted Role: Freddie Mills as a dockyard worker.
• Fake American: The Australian Ed Devereaux as Commander Phillips of the US Navy.
• Fake Brit: The South African-born Sid James as the British Chief Petty Officer Mundy.
• Fake Nationality: Spike Milligan in Brownface as Ranjid.
• Production Posse: Peter Rogers and Gerald Thomas reuse several actors from their Carry On... Series in this film, those being Kenneth Connor, Eric Barker, Leslie Phillips, Joan Sims, Hattie Jacques, Sid James, Victor Maddern, Ed Devereaux, and Jack Smethurst.

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