The final episode in the current run of Inspector Montalbano, at 9pm on 10 November, is Treasure Hunt, based on Andrea Camilleri's as yet untranslated (into English) La Caccia al Tesoro:
An elderly couple, both religious fanatics, barricade themselves in their home and begin shooting from the windows for no apparent reason, until Montalbano's men finally succeed in disarming them.
There seems to be no justification for the couple's insane actions, but police find a strangely disfigured inflatable doll inside their home. A few days later, an identical doll is discovered in a rubbish bin and Montalbano has a bad premonition.
Soon enough, a series of strange occurrences develops - disquieting letters bearing riddles are delivered to Montalbano at Vigata police station, while a young woman is reported missing. A disturbed maniac is playing a macabre game of treasure hunt with the inspector and the riddle must be solved before it's too late.
The good news is that there are 4 more episodes in the pipeline and that the third series of The Killing will take Inspector Montalbano's place on BBC4 from the 17th.