I consider it a very thick scripted. Usually I prefer dramas 80 years, those 70 years I usually always labeled them enough soporific .... but with appropriate exceptions. "The Dutchman disappeared" it is, about a beautiful and charming place of Venice, combined with a solid plot and a surprising (and enigmatic) final, I can not recommend the vision. The final interpretation is ... I rather think that Eric Vansee deep down was inside with all shoes. The murder of Betty remains unsolved ... but it gives me the impression that it was he. Another that remains outstanding is that two members of the gang managed to escape and then Professor Maniago ... another emblematic figure and remains the doubt that he too was involved in the murky affair. The corpse from the severed head ... who was it? Too many unanswered questions, or at least I repeat, each his own interpretation.
