Guest Stars Rolf Kanies as Stefan Tremmel Annika Ernst as Elena Lange Haley Louise Jones as Kirsten Maybach 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 Arne Lenk as Nelson Owen Taylor Sophie Lutz as Dr. Miriam Vogt Gerdy Zint as Auge Hansen Philipp Burkhard Winkler as Student Leon
