 For episode 68 (# 4.2) "Echte Freunde" they made alternative opening titles  including "Stuttgart, Stuttgart" as series title. They credited Lolle and  her friends living in Stuttgart with their characters names. Thats why  Felicitas Woll, Rhea Harder, Alexandra Neldel, Jan Sosniok and Matthias  Klimsa acted uncredited in this episode.