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

Philip Locke

Vogel

Paul Picerni

Zeno's Man

Paul Stassino

Zeno's Man

Λυκούργος Καλλέργης

Μιμή Ντενίση

William Holden

POW (uncredited)