Farley Granger

Inspector Capuana

Sylva Koscina

Barbara Capuana

Silvano Tranquilli

Paolo Santangeli

Annabella Incontrera

Franca Santangeli

Chris Avram

Professor Casali

Sandro Pizzochero

Roberto (as Sandro Pizzorro)

Krista Nell

Renata

Angela Covello

Bettina Santangeli

Fabrizio Moresco

Piero

Andrea Scotti

Gianni

Irene Pollmer

Giannina

Luciano Rossi

Gastone

Ivano Staccioli

The Liar

Nino Foti

Jessica Dublin

Rossella

Paul Oxon

Mauro

Philippe Hersent

The Questor

Nieves Navarro

Lilly (as Susan Scott)

Femi Benussi

Serena

Bruno Boschetti

Policeman

Benito Stefanelli

Lilly's husband

Luigi Ciavarro

Milla Johansson

The first victim (uncredited)