John Saxon
Dr. Marcello Bassi
Valentina Cortese
Laura Craven-Torrani
Dante DiPaolo
Andrea Landini
Luigi Bonos
Albergo Stelletta
Milo Quesada
De Vico / Paccini
Gustavo De Nardo
Dr. Facchetti
Giovanni Di Benedetto
Professor Torrani
Jim Dolen
Priest (uncredited)
Franco Ressel
Arresting Officer at Airport (uncredited)
Marta Melocco
Murder Victim
Virginia Doro
Torrani's Maid
Chana Coubert
Ethel Windell Batocci
Adriana Facchetti
Woman in Sguattera Restaurant