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.

A self-styled "priest of Apollo" persuades a follower to alter her will, then she falls down a lift shaft and dies. Father Brown suspects murder.

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 is staying at a country hotel and finds an eccentric stabbed through the heart in the hotel bar. Suspicion falls on a goup of travelling salesmen.

Father Brown is called to investigate the beheading of a man, commited in a closed garden. Soon there seems to be some problems: How could the murderer get the body out of the garden? And how did the murderer get away? Soon after the first murder a head is discovered into the Seine. The solution to the murder is simple and brilliant.