William Knight, the new Mayor of Kembleford tosses a whisky glass at his wife Eleanor after she asks why a necklace was found under their bed. William later fires his secretary and ex-lover Matilda. As he makes a speech at the Kembleford Annual Village, William is interrupted by local councillor Edwin, who reveals that William has secretly purchased the land of the Polish resettlement camp, which has been wanted to be used for a new coal-fired power station. Susie is furious. William suddenly shudders and collapses, dead and Father Brown soon realises that William was electrocuted.