Helen Rochefort / Mary
Barbara Steele
Baron Kurt Humboldt
George Ardisson
Adele Karnstein / Lisabeth Karnstein
Halina Zalewska
Von Klage
Umberto Raho
Grumalda
Laura Nucci
Count Humboldt
Giuliano Raffaelli
Monk
Nello Pazzafini
The Messenger
Jeffrey Darcey
Story
Ernesto Gastaldi
Director
Antonio Margheriti
Screenplay
Tonino Valerii
Dialogue
Original Music Composer
Carlo Rustichelli
Sound
John Tamblyn
Editor
Mario Serandrei
Costume Design
Humphrey Patterson
Producer
Felice Testa Gay
Set Decoration
Henry Fraser
Hairstylist
Florence Clark
Art Direction
Giorgio Giovannini
Makeup Artist
Edmund Stroll
Director of Photography
Riccardo Pallottini