This documentary details the life of Klaus Fuchs who was a spy for the Soviet Union while working on nuclear research in the United States and Great Britain. It also discusses the contributions of German scientists to the atomic bomb.

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Main Cast: Heinz-Dieter Knaup, Klaus Fuchs, Carl Friedrich von Weizsäcker, Otto Haxel, Nevill Mott, Jürgen Kuczynski, Joseph Rotblat, Wolf Graf von Baudissin, Robert Jungk, Grete Keilson

Director: Joachim Hellwig

Writer: Joachim Hellwig

Editor: Dieter Körner

Cinematographers: Gunther Scholz, Klaus Schulz, Wolfgang Dietzel

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