"Bis dass der Tod euch scheidet" is the title of the episode, airing on WDR tomorrow from 5:45 to 6:15 pm, and again as a repeat on Sunday, 15 September 2013, from 8:35 to 9:05 am. This time it is not a harmless "how lovely it is on the Rhine" episode, but a genuine case of murder by poison. Elly is slipped a photo showing her grandmother with a strange man who turns out to be Hermann Raddatz, the serial poisoner of his own wives. As it happens, though, he never took up with Oma Dortmund, but married her unsuspecting friend Sophie instead.