Top cast
Maria Schneider
Michelle
Sydne Rome
Ann
Vic Morrow
Vic
Robert Vaughn
Stuart Chase
John Whittington
"Boots" Peter Franklin
Nadja Tiller
Lotte
Carl Möhner
Cyrus Franklin
Clelia Matania
Old Neighbour
Marco Tulli
Commissaire Trieste
Armando Brancia
Inspector Carrara
Georg Marischka
Henderson
Renato Pozzetto
Gianni
Maria Cumani Quasimodo
Princess Ruspini (uncredited)
Margherita Horowitz
Maid (uncredited)
Directed by
René Clément
Written by
Nicola Badalucco, Luciano Vincenzoni, Mark Peploe, René Clément
Produced by
Carlo Ponti, Wolfdieter von Stein