A film, Chicago Joe and the Showgirl was made in 1990, based on the story, directed by Bernard Rose, written by David Yallop, and starring Emily Lloyd, Kiefer Sutherland, and Patsy Kensit.
Although two scripts were written (the second a collaboration between Chapman and David Yallop), only one episode was ever filmed.
British author David Yallop wrote extensively about unsolved crimes and conspiracy theories, and in his 1984 book In God's Name suggested that John Paul I died because he was about to uncover financial scandals allegedly involving the Vatican.
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Various theories, such as the one outlined in David Yallop's 1984 book, In God's Name, have suggested that Luciani was murdered because he was investigating and planning reforms for the Vatican Bank, in light of the Banco Ambrosiano scandal.