This is one of the better Tatort episodes, not only from the perspective of excellent story telling, but it also shows the deeply human side of the police, as they gather information to explain a series of connected killings. The audience learns right away who is responsible, but only much later several very emotional details are revealed. The final scene is priceless and will certainly bring a tear to most viewer's eyes.
The actors who have played Detectives Janicke and Brix for some 20 years, have recently announced the end of their work as a Tatort team. Not sure if this was the very last of their collaborations, but they certainly could not have ended with a better episode. Going out on top, they will be dearly missed by this life-long Tatort fan!