Kai Scheve

as Alexander Büsing

as Robert Winkler (14 episodes)

as Rolf Dinter (1 episode)

as Michael Bräutigam

as Frederick

as Kai Wilde (1 episode)

as Gregor Baruch (1 episode)

as Dr. Henning Kirchhoff (2 episodes)

as Dr. Henning Kirchhoff (2 episodes)

as Klaus Leitner (1 episode)

as Max Kampmann (1 episode)

as Dr. Henning Kirchhoff (2 episodes)

as Rolf Kahles

as Nils

as Dr. Henning Kirchhoff

as Dr. Henning Kirchhoff

as Bernd Gebhardt (1 episode)

as Ben Cutler

as Dr. Henning Kirchhoff

as Walden

as Self (2 episodes)

as Jochen Güttler

as Dr. Henning Kirchhoff (15 episodes)

as Armin Raschke (1 episode)

as Dr. Jochen Born (1 episode)