Giorgio Albertazzi

Philo Vance

Mico Cundari

Chester Greene

Micaela Esdra

Ada Greene

Anna Maria Gherardi

Sibilla Greene

Elena Zareschi

Mrs. Greene

Sergio Rossi

Markham

Marco Tulli

Sproot

Mario Avogadro

Rex Greene

Silvio Anselmo

Heath

Andrea Lala

Dr. Von Bloon

Tino Bianchi

Mr. Ross