Horst Schulze as Karl Liebknecht

Lyudmila Kasyanova as Sophie Liebknecht

Mikhail Ulyanov as Frolow

Albert Hetterle as Paul Schreiner

Erika Dunkelmann as Milda Schreiner

Jutta Hoffmann as Käthe Schreiner

Stefan Lisewski as Werner Gutjahr

Albert Garbe as Albin Holzer

Fred Delmare as Waldemar Lehmann

Wolfgang Ostberg as Ernst Lemke

Hans Hardt-Hardtloff as Tischler

Mathilde Danegger as Seine Frau

Rolf Ludwig as von Preuß

Fredy Barten as Abgeordneter

Erich Mirek as Wilhelm Pieck

Rolf Hoppe as Abgeordneter

Frithjof Rüde as

Horst-Tanu Margraf as

Zofia Rysiówna as

Siegfried Weiß as

Hans Finohr as Ledebour

Adolf Peter Hoffmann as

Otto Lang as Scheidemann

Kurt Dunkelmann as

Arthur Jopp as

Adolf Fischer as

Harald Halgardt as

Werner Dissel as Bethmann-Hollweg

Kurt Steingraf as

Alfred Müller as

Peter Brang as

Harry Hindemith as

Otto Roland as

Günther Ballier as

Ute Boeden as

Ursula Braun as

Norbert Christian as

Jochen Diestelmann as

Oswald Foerderer as

Lothar Förster as

Gert Gütschow as

Jürgen Hentsch as

Walter Jupé as

Peter Kalisch as

Werner Kamenik as

Horst Lommatzsch as

Willi Neuenhahn as

Lutz Riemann as

Achim Schmidtchen as

Heinz Schröder as

Günter Schubert as

Werner Schulz-Wittan as

Peter Sturm as

Hermann Stövesand as