Il mostro is a 1977 Italian thriller film directed by Luigi Zampa and starring Johnny Dorelli.
Cast
Johnny Dorelli as Valerio Barigozzi
Sydne Rome as Dina
Orazio Orlando as Commissioner Pisani
Renzo Palmer as Baruffi
Enzo Santaniello as Luca Barigozzi
Renato Scarpa as Livraghi
Yves Beneyton as Giorgio Mesca
Gianrico Tedeschi as Vittorio Santi, "Grandpa Gustavo"
Clara Colosimo as Donatella Domenica Donati
Angelica Ippolito as Anna