Tony Musante as Sam Dalmas

Suzy Kendall as Julia

Enrico Maria Salerno as Inspector Morosini

Eva Renzi as Monica Ranieri

Umberto Raho as Alberto Ranieri

Renato Romano as Professor Carlo Dover

Giuseppe Castellano as Monti

Mario Adorf as Berto Consalvi

Pino Patti as Faiena

Gildo Di Marco as Garullo

Rosita Torosh as Victim

Omar Bonaro as Police Detective

Fulvio Mingozzi as Police Detective

Werner Peters as Antique Dealer

Karen Valenti as Tina

Carla Mancini as Girl Watching TV

Bruno Erba as Police Detective

Annamaria Spogli as Sandra Roversi (uncredited)

Giovanni Di Benedetto as Professor Rinaldi (uncredited)

Reggie Nalder as Needles (uncredited)

Maria Tedeschi as Old Lady in Fog (uncredited)

Aldo Barozzi as Passerby who calls the Police (uncredited)

Ugo Mari as Mario Zandri (uncredited)

Romano Targa as Policeman (uncredited)