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 Angela Roy as Prof. Constanze Winterberg Christian Hockenbrink as Dr. Niklas Rössler Reiner Schöne as Prof. Dr. Stefan Jäger Valerie Potozki as Siri Arvidsson Marko Dyrlich as Gregor Wisenewski Daniel Wiemer as Dr. Leinemann Nicole Ansari-Cox as Elke Reinhart Oona von Maydell as Barkeeperin Susi Pierre Shrady as Notger Lühdorf Frank Kerschnitzki as LKA Beamter Jana Klein as Sekrätärin des Bürgermeisters
