Marcus Mittermeier

as Dr. Mark Sorell (2 episodes)

as Patrick Reitwald

as Markus

as Wolfgang Breitsamer (2 episodes)

as Stefan Mellau

as Matthias

as Moritz Aschbach

as Leo Attinger (1 episode)

as Tom

as Norbert Bachler

as Ulrich Henke

as self (1 episode)

as Professor Gruber

as Peter

as Self (2 episodes)

as Dr. Wedekind

as Barney Brunner

as Alexander Keller

as Stefan Ramin

as Holbrecht (1 episode)

as Johannes Güttler

as Harald Neuhauser (26 episodes)

as Adrian (1 episode)

as Thomas Lichter (1 episode)