Bibi Andersson as Erika Kosnov

Richard Boone as Ward

Nigel Green as The Whore

Dean Jagger as Highwayman

Lila Kedrova as Madam Sophie

Micheál Mac Liammóir as Sweet Alice

Patrick O'Neal as Charles Rone

Barbara Parkins as B. A.

Ronald Radd as Captain Potkin

George Sanders as Warlock

Raf Vallone as Puppet Maker

Max von Sydow as Colonel Kosnov

Orson Welles as Bresnavitch

Sandor Elès as Lt. Grodin

Niall MacGinnis as Erector Set

Anthony Chinn as Kitai

Guy Deghy as Professor

John Huston as Admiral

Fulvia Ketoff as Sonia Potkin

Vonetta McGee as The Negress

Marc Lawrence as The Priest

Cyril Shaps as Police Doctor

Christopher Sandford as Rudolph

Hana Maria Pravda as Mrs. Kazar

George Pravda as Kazar

Ludmilla Dudarova as Mrs. Potkin

Dimitri Tamarov as Ilya

Pehr-Olof Sirén as Receptionist

Daniel Smid as Waiter

Victor Beaumont as The Dentist

Steffen Zacharias as Dittomachine

Laura Forin as Elena Potkin

Saara Ranin as Mikail's Mother

Sacha Carafa as Mrs. Grodin

Brandon Brady as Clocker Dan (uncredited)

Larry Cross as Member of Tillnger Foundation (uncredited)

Rune Sandlund as Mikhail (uncredited)