Guest Stars Haley Louise Jones as Kirsten Maybach Rolf Kanies as Stefan Tremmel Annika Ernst as Elena Lange Paul Bohse as Leon Lange Yung Ngo as Dr. Lee Kwon Christian Hockenbrink as Dr. Niklas Rössler Laura Berlin as Julia Weigert Reiner Schöne as Prof. Dr. Stefan Jäger Hubertus Hartmann as Prof. Dr. Oliver Kohaupt Jennifer Poppek as Sabine Steenken Valerie Potozki as Siri Arvidsson Stefan Gebelhoff as Ernst Velten Martin Thiel as SpuSi Klaus-Peter Strogalski as Schachspieler Johanna Falckner as Jeanette Chryssanthi Kavazi as Schwester Doris Christoph Drobig as IT-Experte Stefan Hartmann as Glubbie Raphaela Kiczka as Studentin
