Horror Mystery Thriller
A newsman works with a blind puzzle-solver to uncover a deadly conspiracy linked to a genetic research facility.
Directed by
Dario Argento
Catherine Spaak
Anna Terzi
Pier Paolo Capponi
Police Supt. Spini
Karl Malden
Franco Arnò
James Franciscus
Carlo Giordani
Giovanni Di Benedetto
Chief of Police Salmi (uncredited)
Werner Pochath
Manuel
Horst Frank
Dr. Braun
Marie Louise Sinclair
Film starlet
Jacques Stany
Prof. Manera
Umberto Raho
Manuel's ex-lover
Rada Rassimov
Bianca Merusi
Franco Ukmar
Policeman - Speaks with Morsella About Food (uncredited)
Vittorio Congia
Righetto (cameraman)
Corrado Olmi
Morsella
Carlo Alighiero
Dr. Calabresi
Margherita Horowitz
Lori's Babysitter (uncredited)
Giuseppe Marrocco
Man at Table in the Saint Peter's Club (uncredited)
Ada Pometti
Telephone operator
Tom Felleghy
Dr. Esson
Ugo Fangareggi
Gigi the Loser
Aldo Reggiani
Dr. Casoni
Aristide Caporale
Smoker in the Billiard Hall (uncredited)
Gennarino Pappagalli
Man in the Terzi's Institute (uncredited)
Stefano Oppedisano
Taxi driver
Pino Patti
Barber
Fulvio Mingozzi
Spimi's man
Cinzia De Carolis
Lori
Tino Carraro
Prof. Fulvio Terzi
Emilio Marchesini
Dr. Mombelli
Walter Pinelli
Sascha Helwin
Martial Boschero
Ettore Arena
Billiard Player (uncredited)
Aldo Parenti
(uncredited)

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