Florinda Bolkan
Carol Hammond
Stanley Baker
Inspector Corvin
Alberto de Mendoza
Sergeant Brandon
Ezio Marano
Lowell - Scientific Squad
Luigi Antonio Guerra
Policeman
Anita Strindberg
Julia Durer (uncredited)
Tony Adams
Policeman (uncredited)
Jean Degrave
St. Paul's Clinic Director (uncredited)
Basil Dignam
Commissioner McCloud (uncredited)
Ursel Eberz
Policewoman Beth (uncredited)
Piero Nistri
Mrs. Gordon's Chauffeur (uncredited)
John Clifford
Train Passenger (uncredited)
Lew Hooper
Policeman (uncredited)
George Spence
Train Passenger (uncredited)
Rita Tobin-Weske
Train Passenger (uncredited)