- Romulus Films
- (A Romulus Film)
- Remus
- (A Remus/Bertram Ostrer Production)
- Romulus Films
- (World-wide, 1958)
- Independent Film Distributors (IFD)
- (United Kingdom, 1958)(Independent Film Distributors Ltd., distribution controlled by, theatrical)
- Cinédis
- (France, 1958)(theatrical)
- Deutsche Film Hansa
- (West Germany, 1958)(theatrical)
- Sascha Filmverleih
- (Austria, 1958)(theatrical)
- NV Meteor Film
- (Netherlands, 1959)(theatrical)
- Sinfonia of London
- (music played by)
- The Admiralty
- (The Admiralty, the producers wish to acknowledge with gratitude the co-operation of)
- The Air Ministry
- (The Air Ministry, the producers wish to acknowledge with gratitude the co-operation of)
- The Mediterranean Fleet Clearance Diving Team
- (the Officers and Men of The Mediterranean Fleet Clearance Diving Team, the producers wish to acknowledge with gratitude the co-operation of, and especially)
- The War Office
- (The War Office, the producers wish to acknowledge with gratitude the co-operation of)
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