Florinda Bolkan ( Florinda Bolkan )

Carol Hammond

Stanley Baker ( Stanley Baker )

Inspector Corvin

Jean Sorel ( Jean Sorel )

Frank Hammond

Silvia Monti ( Silvia Monti )

Deborah

Alberto de Mendoza ( Alberto de Mendoza )

Sergeant Brandon

Penny Brown ( Penny Brown )

Jenny

Mike Kennedy ( Mike Kennedy )

Hubert

Ely Galleani ( Ely Galleani )

Joan Hammond

George Rigaud ( George Rigaud )

Dr. Kerr

Ezio Marano ( Ezio Marano )

Lowell - Scientific Squad

Franco Balducci ( Franco Balducci )

McKenna

Luigi Antonio Guerra ( Luigi Antonio Guerra )

Policeman

Erzsi Paál ( Erzsi Paál )

Mrs. Gordon

Gaetano Imbró ( Gaetano Imbró )

Policeman

Leo Genn ( Leo Genn )

Edmond Brighton

Anita Strindberg ( Anita Strindberg )

Julia Durer (uncredited)

Tony Adams ( Tony Adams )

Policeman (uncredited)

Jean Degrave ( Jean Degrave )

St. Paul's Clinic Director (uncredited)

Basil Dignam ( Basil Dignam )

Commissioner McCloud (uncredited)

Ursel Eberz ( Ursel Eberz )

Policewoman Beth (uncredited)

Piero Nistri ( Piero Nistri )

Mrs. Gordon's Chauffeur (uncredited)

Fred Wood ( Fred Wood )

Train passenger

John Clifford ( John Clifford )

Train Passenger (uncredited)

Lew Hooper ( Lew Hooper )

Policeman (uncredited)

George Spence ( George Spence )

Train Passenger (uncredited)

Rita Tobin-Weske ( Rita Tobin-Weske )

Train Passenger (uncredited)

Fred Wood ( Fred Wood )

Train Passenger (uncredited)

Jack Armstrong ( Jack Armstrong )