Cast Credits Munich Games (2022) Guest starring as Federal President Episode 1x05: Das Spiel (Sep 25, 2022) The Tunnel (2013) Guest starring as Gert Gruber Episode 1x04: Episode 4 (Nov 6, 2013) Hubert und Staller (2011) Guest starring as Horst Greiner Episode 6x08: Blackout (May 10, 2017)