The Castle Ruins S01E10 - Wallander: Luftslottet 2006

Crusty old Greger Stehn and his equally unpopular dogs are poisoned with botulinum. Despite drawing out 20 million krone from the bank Greger lived in a hovel opposite a block of luxury flats where the wives are into yoga, keep fit and botox - which uses botulinum. The money has disappeared and the chief suspect is Johan Haartman, a plastic surgeon with heavy debts who was in the bank when Greger took out the money. Then he and his wife are also poisoned and their baby is fostered by a neighbour, whose child died in a cot death. Is she the killer?