On screen
Cast
26 credited performers
Roger Moore
Otto Hecht
Telly Savalas
Zeno
David Niven
Professor Blake
Stefanie Powers
Dottie Del Mar
Claudia Cardinale
Eleana
Richard Roundtree
Nat Judson
Sonny Bono
Bruno Rotelli
Elliott Gould
Charlie
Anthony Valentine
Volkmann
Siegfried Rauch
Braun
Michael Sheard
Sergeant Mann
Artwork unavailable
Richard Wren
Reistoffer
Philip Locke
Vogel
Artwork unavailable
Steve Ubels
Lantz
Paul Picerni
Zeno's Man
Paul Stassino
Zeno's Man
Artwork unavailable
Manolis Peletis
Character not listed
Artwork unavailable
Stassia Stakis
Character not listed
Lykourgos Kallergis
Character not listed
Lambros Tsangas
Character not listed
Mimi Denissi
Character not listed
Artwork unavailable
Anne Marie Sten
Character not listed
Artwork unavailable
Mary Dracopoulou
Character not listed
Artwork unavailable
Elena Secota
Character not listed
Artwork unavailable
Vanna Reville
Character not listed
William Holden
POW (uncredited)