Barbara Steele

as Cleo Hauff

Walter Brandi

as Albert Kovac

Mirella Maravidi

as Corinne Hauff

Alfredo Rizzo

as Dr. Nemek

Riccardo Garrone

as Joseph Morgan

Luciano Pigozzi

as Kurt - the Gardener

Ennio Balbo

as Oscar Stinnel

Renato Lupi

as Archivist of the town hall

Tilde Dall'Aglio

as Louise - the Maid

Ignazio Dolce

as Policeman

Lucio Zarini

Piero Sartori

Armando Guarnieri

as Ivert / Ivatch

Pietro Martellanza

as Morgan - Assistant (uncredited)

Antonio Pierfederici

as Inspector (uncredited)

Umberto Raho

as Dr. Hauff (uncredited)