Cast
Richard O'Sullivan
Roger Court
Alida Valli
Roberta Gleukovitch
Eduardo Ciannelli
Dr. Vivaldi
Trevor Howard
Major Roger Court
Richard Basehart
Joe Hamstringer
SM
Stephen Murray
British Consul in Venice
Arnoldo Foà
Commissioner
Guido Celano
Chief Constable
Helen Goss
Undetermined Role
GC
Giorgio Costantini
Pescovitch
AC
Angelo Cecchelin
Luza
NV
Nino Vechina
First Killer
AP
Armando Papette
Second Killer
GK
Giovanni Karuz
Third Killer
JB
Joan Butterfield
Mrs. Harrington
AP
Alessandro Paulon
Morgan
RO
Remington Olmsted
Ramondo
JT
Jacopo Tecchi
