Video: The Hammer of God: A Classic Blacksmith Detective Mystery, Courtesy of "Father Brown" on the Hoof Blog

In this mystery of riddles, a man lies dead in the churchyard. The blacksmith's hammer is found nearby. Surely he committed the murder.

But not so fast...
When you go to school to learn the craft of mystery plot writing, this is one of the stories that you study. Now BBC television has incorporated this classic riddle web by G.K. Chesteron into an episode of a popular weekly television show.