A retired colonel, who has been having an adulterous affair, is found dead, his head caved in, with the blacksmith's hammer left nearby. The police have several suspects, but can Father Brown, a visiting priest with a fondness for puzzles, solve the mystery?

An American archaeologist confides in Father Brown that he fears for his life after a mysterious voice in a cave accused him of stealing a golden cross.

Father Brown takes part in a radio discussion with a Scottish philanthropist, who is found shot dead the following morning.

A theatrical manager is found stabbed to death in a locked room. Everyone in the company has an alibi, but Father Brown is determined to find the guilty party.

Father Brown comes to the aid of a young woman who is being blackmailed by a mysterious man with a false nose.

Father Brown comes to the aid of a man receiving threatening letters, but he is unable to prevent him from being killed with an arrow.