Father Brown - Season 2 Episode 3 -

Impoverished aristocrat Sir St John Pryde plans to sell estate land, which antagonizes his tenants led by left-wing Alan Archer. On the day Pryde castle is opened to the public tour guide Audrey Diggle is murdered after claiming that she has evidence to state that the Prydes are not the lawful heirs to the title though St John's nephew Jago believes his uncle was the intended victim and St John's daughter Bunty is secretly in love with Archer. After an attempt to kill Jago Father Brown unmasks the murderer, in the process demonstrating that a supposed family curse has...