Albert’s father

Volker Abeler

Knud Andresen (4 episodes)

Professor Imhoff

Horst Lichter

Self (1 episode)

Albert

Daniel

Franz Fischer (1 episode)

Robert

Professor Gruner (3 episodes)

Zach Urban

Mattes Geolenk (1 episode)

Gunther Rinn (1 episode)

Frank Baumschulte (2 episodes)

Martin Wildner

Karl Bichler

Wolf Berger (2 episodes)

Ronald

Hermann

Friedel Weiland

Pawel Petrowitsch Kirsanow

Ha-Gü

Wolfgang Fuchs (1 episode)

Dr. Joachim Freynik (1 episode)

Raffael Sobcinski

Bruno Lasnik (1 episode)

Lutz Müller

Self (1 episode)

Henning Klatt (1 episode)

Ferdinand Brüneck (1 episode)

Edgar Brüning (1 episode)

Wolfgang Schmitz (1 episode)

Alex Steiner

Dr. Hermann Nicolai (1 episode)

Kurt (1 episode)

Dr. Jonas Berger / Felipe

Stefan Hartig (3 episodes)

Oberarzt Gruber (1 episode)

Arndt Brunner (9 episodes)

Pfarrer Hendrik Klein (1 episode)

Michael Reidinger (1 episode)

Lukas Schauttner

Fränkie

Hermann Mohrle

Michael Abraham (1 episode)

Klaus Koller (3 episodes)

Prof. Kringe (1 episode)

Ludger Simbek (1 episode)

Thomas Wiesner (1 episode)

Ralf Sandner (1 episode)

Matthias Mühlenhoff (1 episode)

Altmann

Hannes

Herr Kessler (1 episode)

Fritz Bermann (1 episode)

Matthias Grimmer

Self (2 episodes)

Staatsanwalt Böhringer (1 episode)

Oliver Busch (6 episodes)

Axelrod (1 episode)

Jürgen Eck (1 episode)

Armin Trenck (1 episode)

Thomas Böhm (1 episode)

Jan Kelm

Sebastian Claasen (1 episode)

Martin Seibt

Peter Dittmann

Roland Engelhardt (1 episode)

Martin Herdecker

Oberscharführer Karl Höhler

Dieter Striesow

Michael Heitmann

Self (1 episode)

Diether

Thorben Mossmann

Self (2 episodes)

Wilfried Ottrop (1 episode)

Prof. Dr. Karl-Heinz Haeßler

Salomon

Bernd

Stephan Bertsch, Martin's former boyfriend

Merles Vater

Andreas Reiner

Stefan Kramer

Self (1 episode)

Self (1 episode)

Tim Bergmann

Self (1 episode)

Paul Zorn (29 episodes)

Günther Schütte, Prisoner Nr. 82

Self (4 episodes)

Ingo Konzack (1 episode)

Peter Marquardt (1 episode)

Markus Mesenburg (1 episode)

Tom (1 episode)

Horst Cervinski (1 episode)

Ralf Schmölke (1 episode)

Peter Wedel

German E-Chief

Frank

Der Friese

Amberg

Mandel (1 episode)

Udo Hoffmann

Eggers

Kellner (1 episode)

Franz Gebauer (1 episode)

Mike

Mario Ross (1 episode)

Norbert Prechtel

Renner (1 episode)

Valentin (1 episode)

(1 episode)

Rainer Metz (1 episode)

Grosche (1 episode)

Robert Grosche (4 episodes)

Dealer

Keule (1 episode)

Kai

Eckart (1 episode)