"Following the mysterious decapitation of an insurance investigator, Police Inspector Peretti is put onto the case, but all the clues lead to an unsolved case of kidnapping and murder."
George Hilton
as Inspector Luca Peretti
Salvo Randone
as Chief Marò
William Berger
as Giorgio Canavese
Marilù Tolo
as Dr. Anna Borgese
Manuel Zarzo
as Brigadier Bozzi (as Manolo Zarzo)
Patty Shepard
as Paola Rossi, the teacher
Piero Lulli
as Alessandro Moroni
Helga Liné
as Mrs. Paradisi
Tullio Valli
as Oliviero Moroni
Dante Maggio
as Mattia Guardapelle
Dana Ghia
as Eleonora Moroni
Alfredo Mayo
as Beniamino
Mónica Randall
as Carla Moroni
Corrado Gaipa
as Head of Insurance Company
Lara Wendel
as Stefania Moroni (as Daniela Rachele Barnes)
Francesco Di Federico
as Vincenzo Paradisi
Lola Gaos
as Adele Rudigiani
Sergio Mendizábal
as Rag. Civitelli
Sofia Dionisio
as Servant at Moroni's home
Luigi Antonio Guerra
as Postman witness
Elisa Mainardi
Enzo Fiermonte
as Jib crane owner
Annamaria Chio
as Woman witness in post office
Antonio Spaccatini
as Silvestri
Guerrino Crivello
as Barman at Bar Latteria
Andrea Scotti
as Witness in post office
Pietro Ceccarelli
as Giorgio Canavese's Bodyguard (uncredited)
Jean-Pierre Clarain
as Driver in Moroni's Home (uncredited)
Remo De Angelis
as Mario Ansuini (uncredited)
Giuseppe Marrocco
as Policeman in the Ansuini Crime Scene (uncredited)
Sergio Testori
as Kidnapper (uncredited)
Tonino Valerii
Director
Roberto Leoni
Story
Ennio Morricone
Original Music Composer
Franco Fraticelli
Editor
Screenplay
Franco Bucceri
Manuel Rojas
Director of Photography
Francisco Canet Cubel
Art Direction
Claudio Cinini
Fiorenzo Senese
Costume Design
Vittorio Biseo
Makeup Artist