From this episode on Matula drives a new Alfa Romeo 155 V6 with plate F-XJ 4215. In the previous episode he alread drove a 155 with the same plate, but it was slightly different by colour and interior details (eg. headrests).
Differently than the usual schema, this story starts showing the murderer and then diverts the focus on another question, leaving Dr. Franck and Matula suspect that it's a case of murder step by step during the episode.
Second time Matula sneaks under cover into a sect for his investigations. First time was in 9.03 (Donnerstag letzter Akt).