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 Laura Berlin as Julia Weigert Axel Stein as Thomas Müller Guido Broscheit as Prof. Christian Berkenbusch Penelope Frego as Giulia Casiraghi Karolina Lodyga as Sonya Kozyra Anna-Katharina Fecher as Vanessa Henke Juri Senft as Elias Jacobi
