"Inspector Tellini investigates serial crimes where victims are paralyzed while having their bellies ripped open with a sharp knife."
Giancarlo Giannini
as Inspector Tellini
Claudine Auger
as Laura
Barbara Bouchet
as Maria Zani
Rossella Falk
as Franca Valentino
Silvano Tranquilli
as Paolo Zani
Annabella Incontrera
as Mirta Ricci
Ezio Marano
as Masseur
Barbara Bach
as Jenny
Stefania Sandrelli
as Anna Tellini
Giancarlo Prete
as Mario
Anna Saia
as Maria's friend
Nino Vingelli
as Inspector Di Giacomo
Daniele Dublino
as Entomologist
Giuseppe Fortis
as Psychiatrist
Guerrino Crivello
as Informer
Fulvio Mingozzi
as Surgeon
Giorgio Dolfin
as Policeman
Carla Mancini
as Client at beauty parlor
Alfonso Giganti
as Policeman in projection room
Eleonora Giorgi
as Maid in beauty parlor
Ettore Mattia
as La catapulta
Eugene Walter
as Ginetto, the waiter (as Walter Eugene)
Giuliana Farnese
as Mrs. Fluzzi (uncredited)
Paolo Cavara
Director
Lucile Laks
Screenplay
Marcello Danon
Story
Producer
Ennio Morricone
Original Music Composer
Marcello Gatti
Director of Photography
Mario Morra
Editor
Piero Poletto
Art Direction
Luigi Urbani
Set Decoration
Fiorella Gaetano
Costume Design