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
Mario Bava
Director
Mario Bava
Director of Photography
Roberto Nicolosi
Original Music Composer
Sergio Corbucci
Screenplay
Ennio De Concini
Story
Ennio De Concini
Screenplay
Sergio Corbucci
Story
Eliana De Sabata
Story
Eliana De Sabata
Screenplay
Giorgio Giovannini
Art Direction
Neda Matteucci
Script Supervisor
Franco Prosperi
Screenplay
Tina Grani
Costume Design
Franco Prosperi
Assistant Director
Antonio Rinaldi
Gaffer
Euclide Santoli
Makeup Artist
Massimo De Rita
Executive Producer
Mino Guerrini
Screenplay
Emilio Schuberth
Set Dresser
Mario Bava
Screenplay
Salvatore Billitteri
Associate Producer
Mario Serandrei
Editor
Mara Rocchetti
Hair Designer
Paolo Mercuri
Production Manager
Ubaldo Terzano
Camera Operator
Armando Govoni
Production Assistant
Enrico Checchi
Second Assistant Director
Luigi D'Andria
Set Decoration
Lina Caterini
Assistant Editor