Characters played by Farley Granger
Inspector Capuana
Characters played by Sylva Koscina
Barbara Capuana
Characters played by Silvano Tranquilli
Paolo Santangeli
Characters played by Annabella Incontrera
Franca Santangeli
Characters played by Chris Avram
Professor Casali
Characters played by Sandro Pizzochero
Roberto
Characters played by Krista Nell
Renata
Characters played by Angela Covello
Bettina Santangeli
Characters played by Fabrizio Moresco
Piero
Characters played by Andrea Scotti
Gianni
Characters played by Irene Pollmer
Giannina
Characters played by Luciano Rossi
Gastone
Characters played by Ivano Staccioli
The Liar
Characters played by Nino Foti
[no data]
Characters played by Jessica Dublin
Rossella
Characters played by Paul Oxon
Mauro
Characters played by Philippe Hersent
The Questor
Characters played by Nieves Navarro
Lilly
Characters played by Femi Benussi
Serena
Characters played by Bruno Boschetti
Policeman (segment "incipit")
Characters played by Benito Stefanelli
Lilly's Husband
Characters played by Luigi Ciavarro
[no data]
Characters played by Kim Pope
Characters played by Harry Reems
(in edited American version)
Characters played by Tina Russell
(edited American version)
Characters played by Marc Stevens
Characters played by Silverio Conti
Fingerprint Technichan
Characters played by Ulla Johannsen
First Victim