John Saxon

Dr. Marcello Bassi

Letícia Román

Nora Davis

Valentina Cortese

Laura Craven-Torrani

Dante DiPaolo

Andrea Landini

Titti Tomaino

Inspector

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)

Robert Buchanan

Dr Alessi

Marta Melocco

Murder Victim

Lucia Modugno

Nurse

Franco Moruzzi

Policeman

Virginia Doro

Torrani's Maid

Mario Bava

Uncle Augusto

Chana Coubert

Ethel Windell Batocci

Adriana Facchetti

Woman in Sguattera Restaurant

Dafydd Havard

Tiberio Murgia

Peggy Nathan

Lido Pini

John Stacy