Horst Drinda as Arvid Harnack

Irma Münch as Mildred Harnack

Horst Schulze as Adam Kuckhoff

Barbara Adolph as Greta Kuckhoff

Klaus Piontek as Harro Schulze-Boysen

Jutta Wachowiak as Libertas Schulze-Boysen

Eckhard Bilz as Fähnrich Thierbach

Harry Pietzsch as Walter Küchenmeister

Karin Lesch as Elfriede Paul

Marylu Poolman as Elisabeth Schumacher

Eberhard Esche as Kurt Schumacher

Katharina Lind as Oda Schottmüller

Günther Simon as John Sieg

Jessy Rameik as Sophie Sieg

Ursula Karusseit as Hilde Coppi

Manfred Karge as Hans Coppi

Rudolf Ulrich as Franz Gauss

Heidemarie Wenzel as Ina Schreier

Manuela Marx as Hanna

Herbert Köfer as Schnabel

Christoph Beyertt as Butler/Nachrichtensprecher

Peter Sindermann as Hans Werner

Hans-Peter Reinecke as Karl Winkler

Johannes Wieke as Papa Schulze

Wilhelm Koch-Hooge as General Münch

Leon Niemczyk as Vincente Douglas

Siegfried Weiß as Wilhelm Canaris

Alfred Müller as Wolfgang Langhoff

Karl Sturm as Major Krüger

Wolfgang Greese as von Pannitz

Alexander Wikarski as Willy

Gerhard Rachold as Mr. Sulivan

Hannjo Hasse as 1. Deutscher

Ivan Malré as von Sommer

Frank Michelis as Feuerwehrmann

Erika Müller-Fürstenau as Fürstin

Rolf Ripperger as Hauptmann Hartwig

Heinz Behrens as Oberleutnant Schlief

Erich Brauer as Zigarettenladenbesitzer

Ursula Braun as Frank

Hans-Joachim Büttner as Verleger