Steffen Groth

as Seifert

as Thomas Seifert

as Thomas Seifert

as Pierre Hartwich (12 episodes)

as Markus Zahm

as Uli

as Jens

as Ingvar Minkwart (1 episode)

as Marco Brückmann (1 episode)

as Tom

as Self (1 episode)

as Greg

as Adrian Schmaltz (1 episode)

as Nico

as Robert

as Werner

as Alexander Matzek (1 episode)

as Markus (16 episodes)

as Hannes

as Guido

as Dr. David Habenberg (1 episode)

as Kai

as Ronald (23 episodes)

as Dr. Sebastian Pringel (1 episode)

as Hauke Jessen