Trudy Farrell
Ira von Fürstenberg
Marie Chaney
Edwige Fenech
Jack Davidson
Howard Ross
Peggy Davidson
Helena Ronee
George Stark
Teodoro Corrà
Isabel
Ely Galleani
Jill Stark
Edith Meloni
Charles
Mauro Bosco
Nick Chaney
Maurice Poli
Prof. Gerry Farrell
William Berger
Executive Producer
Editor
Mario Bava
Director
Director of Photography
Additional Writing
Assistant Director
Mario Bianchi
Original Music Composer
Piero Umiliani
Novel
Agatha Christie
Screenplay
Mario Di Nardo
Antonio Rinaldi
Producer
Luigi Alessi
Still Photographer
Armando Pietrangeli
Costume Design
Giulia Mafai
Camera Operator
Emilio Varriano
Assistant Costume Designer
Roberto Ranucci
Makeup Artist
Orietta Melaranci
Mario Bregni
Pietro Bregni
Story
Set Decoration
Sound
Leopoldo Rosi
Assistant Production Manager
Alfonso Cucci
Production Design
Giuseppe Aldrovandi
Production Manager
Adolfo Martello
Set Dresser