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Writers: Teodoro Corra, Stelvio Massi, Dardano Sacchetti screenplay, Dardano Sacchetti story, Raniero di Giovanbattista
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Release date: 22 Dec 1975
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Countries: Italy
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Languages: Italian
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Runtime: 95 min
Mark Terzi goes to Genoa to take on the case of a serial killer who calls himself The Sphinx