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

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