The Mask of the Demon

Father Brown investigates the murder of a B movie director when he comes to film in Kembleford.

Sid is engaged with an heiress arrested for her father's murder.

Father Brown investigates the murder of a former hangman.

Father Brown gets involved in the revenge of a crazy comedian.

Father Brown must help Flambeau in stealing the Pope's gift to the Queen.

Lady Felicia's reckless driving lands her in the next hospital bed to Mrs McCarthy.

Airman Ned LeBroc returns after eight years away, allegedly as a spy, only to discover his wife Meg, assuming he was dead, is marrying his brother Geoffrey. Daughter Millie is pleased to see him, unlike his wing commander father, who regards him as a deserter and coward. When Ned is shot dead Mallory arrests Meg but a card found in Ned's possession leads Father Brown to an unusual club which reveals Ned's secret life and the circumstances of his death.

After young baker Alexander Moore dies in an accident, his corpse is stolen from the graveyard and discovered on the premises of undertaker Peter Blackstone, father of Alexander's secret girlfriend Catherine, who is in a feud with his mother Ruth, though he denies taking it. Father Brown realizes that Alexander had faked his own death but that something went wrong. In establishing how and why he uncovers a family secret dating back many years.

When Robert Twyman receives a note telling him to "confess" or his son will die and the threat is carried out, Father Brown must figure out how the killer got into and out of a securely locked house.

Father Brown hosts a jazz quartet whose car has broken down, but they are interrupted by Emmanuel Jammite, who claims that musician Joseph Sinclair stole his girlfriend, the band's singer Yveline from him back in Haiti. Emmanuel is a voodoo priest, so suspicion falls on him when the house is broken into and Sinclair's corpse is later found floating in a swimming pool. Emmanuel swears he is innocent but dies trying to fleeing the police. Father Brown believes one of the band members is the true murder and an innocent man lost his life because he was framed.