Commissioner Bauer initially ignores e-mails with stranger pictures, with a tile marked, until it turns out that's when they become victims of crimes like poisoning and abduction. The team races to identify the people and link them to him and the fiend, presumably after revenge for a conviction, but that's a long list, including paroled Andrej Sukow and Max Fleischhauer. Bauer checks on former childhood kidnap victim Adam Klein, who never recovered psychologically, reported dead by his elder brother Tom. Bauer's next mail says his missing detective Katharina Hahn is to die at noon.
—KGF Vissers