- Christoph Maria Herbst
- Â Bernd Stromberg 46 episodes, 2004-2012
- Oliver Wnuk
- Â Ulf Steinke 46 episodes, 2004-2012
- Bjarne Mädel
- Â Berthold Heisterkamp 46 episodes, 2004-2012
- Diana Staehly
- Â Tanja Seifert / ... 46 episodes, 2004-2012
- Lars Gärtner
- Â Herr Becker / ... 28 episodes, 2005-2012
- Milena Dreißig
- Â Jennifer Schirrmann 25 episodes, 2007-2012
- Martina Eitner-Acheampong
- Â Erika Burstedt 25 episodes, 2004-2007
- Laurens Walter
- Â Lars Lehnhoff 16 episodes, 2005-2012
- Maja Beckmann
- Â Sabine Buhrer / ... 14 episodes, 2004-2012
- Peter Rütten
-  Herr Pötsch / ... 12 episodes, 2004-2012
- Angelika Richter
-  Nicole Rückert 7 episodes, 2005-2007
- Ramona Kunze-Libnow
- Â Magdalena Prellwitz 9 episodes, 2009
- Kai-Peter Malina
-  Achim Dörfler 9 episodes, 2009
- Tatjana Alexander
- Â Tatjana Berkel 8 episodes, 2004
- Sinan Akkus
- Â Sinan Turculu 8 episodes, 2004
- Simon Licht
- Â Herr Wehmeyer / ... 8 episodes, 2007-2009
- Rainer Laupichler
-  Herr Nübel / ... 7 episodes, 2009-2012
- Max Mauff
- Â Azubi Jonas / ... 6 episodes, 2011-2012
- Thomas Meinhardt
- Â Tremmel / ... 5 episodes, 2011-2012
- Prodromos Antoniadis
-  Koch Möllers / ... 5 episodes, 2004-2012
- Walter Gontermann
- Â Dr. Heinemann 5 episodes, 2005
- Michaela Caspar
- Â Frau Papenacker / ... 4 episodes, 2011-2012
- Bernd Stegemann
- Â Herr Stankowski 4 episodes, 2011-2012
- Leon Seidel
- Â Helge 4 episodes, 2009-2011
- Therese Hämer
- Â Birgit Stromberg 3 episodes, 2004-2005
- Sarah Masuch
- Â Vanessa Schubert 3 episodes, 2005
- Jürgen Rißmann
- Â Hausmeister 3 episodes, 2007-2011
- Ulrike Grote
- Â Frau Wilhelmi 2 episodes, 2011-2012
- Jan Viethen
- Â IT - Fachmann / ... 3 episodes, 2004-2012
- Alexandra von Schwerin
- Â Frau Hilpers 2 episodes, 2004-2012
- Christina Drechsler
- Â Mia 2 episodes, 2009
- Nadja Becker
- Â Maja Decker / ... 2 episodes, 2007-2012
- Frau Ph
- Â Frau Ph. 2 episodes, 2011
- Andreas Seyferth
- Â Helmut Petersen 1 episode, 2004
- Axel Siefer
- Â Roland Kaisers Manager 1 episode, 2004
- Piet Fuchs
- Â Herr Fritsche 1 episode, 2004
- Bernd Moss
- Â Herr Grahms 2 episodes, 2005
- Andreas Förster
-  Herr Röhler 1 episode, 2004-2005
- Lon Haber
- Â Johannes Schmidt 1 episode, 2005
- Andreas Schmidt
-  Theo Höltel 1 episode, 2005
- Peter Lerchbaumer
- Â Schwiegervater Lorenz 1 episode, 2005
- Sven Pippig
- Â Walter Loermann 1 episode, 2007
- Cristina do Rego
- Â Ina 1 episode, 2004
- Robert Schupp
-  Herr Tröscher 1 episode, 2004
- Caroline Peters
- Â Kerstin Aumann 1 episode, 2005
- Victoria Mayer
- Â Alexandra Klausen 1 episode, 2005
- Veit Stübner
- Â Hans Georg Althoff 1 episode, 2005
- Patrick Heyn
-  Jochen Schüller 1 episode, 2007
- Heinrich Hadding
- Â Rudi Wippermann 1 episode, 2007
- Steffen Münster
- Â Herr Nehring 1 episode, 2009
- Jörg Pose
-  Jochen Rüther 1 episode, 2011
- Wolfgang Dinslage
- Â Herr Friebe 1 episode, 2004
- Luke Wilkins
- Â Knut 1 episode, 2005
- Detlef Kapplusch
- Â Herr Wuttke 1 episode, 2005
- Sascha Nathan
- Â Dr. Jendretzke 1 episode, 2007
- Jürgen Haug
- Â Herr Wiebrecht, Erikas Verehrer 1 episode, 2007
- Rita Lengyel
- Â Ute 'Sally' 1 episode, 2009
- Martin Fromme
- Â Gernot 1 episode, 2009
- Christine Schmidt-Schaller
-  Frau Rüther 1 episode, 2011
- Johannes Allmayer
- Â Pfarrer Kleuser 1 episode, 2012
- Raphael Rubino
- Â Kellner 1 episode, 2004
- Patrick von Blume
-  Peter Pöhlmann 1 episode, 2005
- Yolette Thomas
- Â Nyota N'yangasongwa 1 episode, 2005
- Gerdy Zint
- Â Sigi 1 episode, 2009
- Atto Suttarp
- Â Bauer Overbeck 1 episode, 2009
- Aurel Manthei
- Â Sascha 1 episode, 2009
- Peter Trabner
- Â Jens Reiersen 1 episode, 2011
- Mo Bahla
- Â Azubi Malik 1 episode, 2011
- Stephan Schad
- Â Herr Dorenbach 1 episode, 2011
- Hannah Scheibe
- Â Empfangsdame Frau Wesel 1 episode, 2011
- Mario Müller
- Â Mann (Bowling) 1 episode, 2005
- Stefan Sieweke
- Â Spritti 1 episode, 2007
- Panagiota Dimareli
- Â Mitarbeiterin 1 episode, 2011
- Frank Montenbruck
- Â Mitarbeiter Montenbruck (uncredited) 39 episodes, 2004-2012
- Stefan Lampadius
- Â Mitarbeiter Lambert (uncredited) 38 episodes, 2005-2012
- Joe Henselewski
-  Mitarbeiter Müller (uncredited) 34 episodes, 2004-2012
- Andreas Hermann
- Â Mitarbeiter Hermann (uncredited) 31 episodes, 2005-2012
- Rita Winkelmann
-  Mitarbeiterin Klüver (uncredited) 30 episodes, 2004-2011
- Prashant Prabhakar
- Â Mitarbeiter Prashant (uncredited) 30 episodes, 2005-2012
- Dorothea Förtsch
- Â Sachbearbeiterin (uncredited) 16 episodes, 2005-2007
- Suzanne Landsfried
- Â Mitarbeiterin Landsfried / ... (uncredited) 8 episodes, 2005-2012
- Ralf Husmann
- Â Mitarbeiter Hans (uncredited) 4 episodes, 2004-2007
- Stefan Herbert
- Â Herr Pritsch (uncredited) 4 episodes, 2004-2005
- Ariane Raspe
- Â Mitarbeiterin Raspe / ... (uncredited) 2 episodes, 2005-2009
- Lorenz Claussen
- Â Klaus Hilpers (uncredited) 1 episode, 2004
- Nikolai Will
- Â Computerexperte (uncredited) 1 episode, 2005
- Petra Kalkutschke
- Â Gast (uncredited) 1 episode, 2005
- Michael Kleiber
-  Möbelpacker (uncredited) 1 episode, 2005
- Komi Mizrajim Togbonou
- Â Mann von Nyota (uncredited) 1 episode, 2005
- Ulrike Schwab
- Â Mitarbeiterin mit Augenpflaster (uncredited) 1 episode, 2007
- Marco Klammer
- Â Mitarbeiter (uncredited) 1 episode, 2012