Laurence Harvey Lieutenant "Buster" Crabb, R.N.V.R. Michael Craig Leading Seaman Knowles Dawn Addams Third Officer Jill Masters, W.R.N.S John Clements The Admiral Sid James Chief Petty Officer Thorpe Alec McCowen Able Seaman Morgan Nigel Stock Able Seaman Fraser Arnoldo Foà Tomolino Gianna Maria Canale Conchita Massimo Serato Forzenelli Giacomo Rossi Stuart Rosati Carlo Giustini Fellini Raymond Young Celloni David Lodge Sergeant Ewen Solon Willowdale Captain Brian Oulton Holford Howard Marion-Crawford Wing Commander John Moffatt Diver Laurence Harvey Lieutenant "Buster" Crabb, R.N.V.R. Michael Craig Leading Seaman Knowles Dawn Addams Third Officer Jill Masters, W.R.N.S John Clements The Admiral Sid James Chief Petty Officer Thorpe Alec McCowen Able Seaman Morgan Nigel Stock Able Seaman Fraser Arnoldo Foà Tomolino Gianna Maria Canale Conchita Massimo Serato Forzenelli Giacomo Rossi Stuart Rosati Carlo Giustini Fellini Raymond Young Celloni David Lodge Sergeant Ewen Solon Willowdale Captain Brian Oulton Holford Howard Marion-Crawford Wing Commander Cyril Shaps Miguel Lee Montague Miguel's Mate John Lee Flag Lt. Terence Longdon Lt Bailey Alan Webb British Consul John Moffatt Diver Derren Nesbitt Yvonne Romain Laurence Harvey Lieutenant "Buster" Crabb, R.N.V.R. Michael Craig Leading Seaman Knowles Dawn Addams Third Officer Jill Masters, W.R.N.S John Clements The Admiral Sid James Chief Petty Officer Thorpe Alec McCowen Able Seaman Morgan Nigel Stock Able Seaman Fraser Arnoldo Foà Tomolino Gianna Maria Canale Conchita Massimo Serato Forzenelli Giacomo Rossi Stuart Rosati Carlo Giustini Fellini Raymond Young Celloni David Lodge Sergeant Ewen Solon Willowdale Captain Brian Oulton Holford Howard Marion-Crawford Wing Commander Cyril Shaps Miguel Lee Montague Miguel's Mate John Lee Flag Lt. Terence Longdon Lt Bailey Alan Webb British Consul John Moffatt Diver Derren Nesbitt Yvonne Romain Laurence Harvey Lieutenant "Buster" Crabb, R.N.V.R. Michael Craig Leading Seaman Knowles Dawn Addams Third Officer Jill Masters, W.R.N.S John Clements The Admiral Sid James Chief Petty Officer Thorpe Alec McCowen Able Seaman Morgan Nigel Stock Able Seaman Fraser Arnoldo Foà Tomolino Gianna Maria Canale Conchita Massimo Serato Forzenelli Giacomo Rossi Stuart Rosati Carlo Giustini Fellini Raymond Young Celloni David Lodge Sergeant Ewen Solon Willowdale Captain Brian Oulton Holford Howard Marion-Crawford Wing Commander Cyril Shaps Miguel Lee Montague Miguel's Mate John Lee Flag Lt. Terence Longdon Lt Bailey Alan Webb British Consul John Moffatt Diver Derren Nesbitt Yvonne Romain Laurence Harvey Lieutenant "Buster" Crabb, R.N.V.R. Michael Craig Leading Seaman Knowles Dawn Addams Third Officer Jill Masters, W.R.N.S John Clements The Admiral Sid James Chief Petty Officer Thorpe Alec McCowen Able Seaman Morgan Nigel Stock Able Seaman Fraser Arnoldo Foà Tomolino Gianna Maria Canale Conchita Massimo Serato Forzenelli Giacomo Rossi Stuart Rosati Carlo Giustini Fellini Raymond Young Celloni David Lodge Sergeant Ewen Solon Willowdale Captain Brian Oulton Holford Howard Marion-Crawford Wing Commander Cyril Shaps Miguel Lee Montague Miguel's Mate John Lee Flag Lt. Terence Longdon Lt Bailey Alan Webb British Consul John Moffatt Diver Derren Nesbitt Yvonne Romain