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 Jesse Albert as Andreas Steffen Groth as Adrian Schmaltz Sabine Vitua as Anna Zempel Tom Gerhardt as Winfried Treptekes Jana Schölermann as Tatjana Schmaltz
