On screen
Cast
15 credited performers
John Drew Barrymore
Paolo Morand
Artwork unavailable
Luisa Rivelli
Anna Lugani
Lisa Gastoni
Elisabeth Buckner
Jean Claudio
Davide Lugani
Umberto D'Orsi
Commissioner Perrotti
Artwork unavailable
Peter Dane
Dr. Bowen
Ombretta Colli
Christine
Piero Gerlini
The sergeant
Artwork unavailable
Michele Francis
Character not listed
Artwork unavailable
Aldo Bonamano
Picchiatore Grasso
María Badmajew
Character not listed
Nini Rosso
Character not listed
Artwork unavailable
Claudia Younes
Character not listed
Sergio Gibello
Character not listed
Elisa Mainardi
The woman who sends the anonymous letter