- Highroad Productions
- (A Highroad Presentation)
- Columbia Pictures Corporation
- (United Kingdom, 1961)(theatrical)
- Columbia Pictures
- (United States, 1961)(theatrical)
- Columbia Pictures of Canada
- (Canada, 1961)(theatrical)
- Kamera Film Aktieselskap
- (Norway, 1961)(theatrical)
- Columbia Film-Verleih
- (West Germany, 1961)(theatrical)
- Halas and Batchelor Cartoon Films
- (Halas & Batchelor Cartoon Films Ltd., maps by)
- Other Departments of the Greek Government
- (many other departments of the Greek Government, at the same time they wish to acknowledge a special debt of gratitude to, for their unstinting aid, co-operation, hospitality and friendship throughout those aspects of the production in Greece)
- Sinfonia of London
- (Sinfonia Of London, music played by)
- The Admiralty
- (The Admiralty, the makers of the film wish to thank, for their most generous advice and assistance)
- The Greek People
- (the Greek People, at the same time they wish to acknowledge a special debt of gratitude to, for their unstinting aid, co-operation, hospitality and friendship throughout those aspects of the production in Greece)
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