Daniel Friedrich

as Christoph Bächle (2 episodes)

as Herr Schneider (6 episodes)

as Georg (8 episodes)

as Frank Limberger (6 episodes)

as Gabriel Jagow

as Gerald Gallagher

as Peter Kincaide

as Boris Bargfeld (1 episode)

as Klaus Stetten

as Gernot Keller (1 episode)

as Dr. Geleitner

as Falk Mattheissen (26 episodes)

as Prof. Bittner

as Dr. Pechstein

as Dr. Schanderl

as Prof. Peter Blumfeld

as Robert Kirchner (1 episode)

as Julian von Schönhausen (1 episode), as Martin Gruber (1 episode)

as Roland Thibon (3 episodes)

as Theo Krause

as Günther Cramer (1 episode)

as Museumsdirektor Reimers (1 episode)

as Richard Rose (1 episode)