Guest Stars Haley Louise Jones as Kirsten Maybach Annika Ernst as Elena Lange Rolf Kanies as Stefan Tremmel Paul Bohse as Leon Lange Yung Ngo as Dr. Lee Kwon Christian Hockenbrink as Dr. Niklas Rössler Jesse Albert as Andreas Axel Stein as Thomas Müller Guido Broscheit as Prof. Christian Berkenbusch Penelope Frego as Giulia Casiraghi Sophie Lutz as Dr. Miriam Vogt Arne Lenk as Nelson Owen Taylor Gerdy Zint as Auge Hansen Philipp Burkhard Winkler as Student Leon
