Lee Marvin as Harry Wargrave

Robert Shaw as General Markenkov

Linda Evans as Else Lang

Maximilian Schell as Colonel Nikolai Bunin

Joe Namath as Leroy

Horst Buchholz as Scholten

Mike Connors as Haller

Claudio Cassinelli as Molinari

Kristina Nel as Helga Mann

David Hess as Geiger

Günter Meisner as Rudi Muehler

Sylva Langová as Olga

Cyril Shaps as Sedov

Vladek Sheybal as Zannbin

Arthur Brauss as Neckermann

Sky du Mont as Philip John

Richard Marner as Prachko

Arnold Drummond as Commissar

Paul Glawion as Alfredo

Dan van Husen as Bernardo

Rainer Steffen as 1st Policeman

Dieter Groest as 2nd Policeman

Hans-Jürgen Leuthen as Dutch Customs Man

Maximilian Wolters as Swiss Officer

Gudo Hoegel as Adjutant of Molinari

Rudolf Waldemar Brem as 1st Signal Man

Erland Erlandsen as 2nd Signal Man

Walter Kraus as Engineer

Osman Ragheb as Security Agent

Robert Rietti as Marenkov (voice)