Maverick Quek plays Tuhan, a Vietnamese man. However, he speaks Mandarin Chinese.
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 character's names. That's why Felicitas Woll, Rhea Harder, Alexandra Neldel, Jan Sosniok and Matthias Klimsa acted uncredited in this episode.