This season, Father Brown finds himself pitted against new Inspector Sullivan, as the priest attempts to solve cases more sinister than ever - an exorcism, an abduction, a poisoning and a murder put Father Brown's instincts to the test and his own livelihood at risk.
Episode 1
Father Brown is sceptical when a parishioner believes she's being haunted by her sister who went missing years ago. However, when she herself vanishes, he must investigate both disappearances.
Episode 2
When an ex-serviceman drops dead in the street, Father Brown investigates the facility where he was a patient. Could something sinister lie beneath the surface at Danvers Retreat?
Episode 3
The grand opening of Pryde Castle ends in disaster when a guide is struck by an arrow. Contrary to Inspector Sullivan, Father Brown becomes convinced that the motive lies buried in the family's past.
Episode 4
When convicted killer Violet is given a temporary reprieve from the gallows, she begs Father Brown to prove her innocence. With only three days in hand, can he find the real culprit before it's too late?
Episode 5
The mysterious disappearance of an old friend sends Father Brown and Sid on a quest to find the mythical Lannington Rosary. However can an old adversary, back from the dead, be trusted to help?
Episode 6
Father Brown finds himself immobilised with a broken leg when a member of Kembleford's WI dies in mysterious circumstances. Can he crack the case armed only with a telescope and the gang to help?
Episode 7
When a troubled young woman's father is killed just weeks after her mother's death, Father Brown must help her deal with her grief, while solving the father's inexplicable murder by one of three weapons.
Episode 8
Father Brown is unconvinced when a recently returned prisoner of war is suspected of the killing of his tyrannical uncle. And it seems that someone will stop at nothing to keep the priest from the truth...
Episode 9
Through a series of poison pen letters, a gruesome death on a local farm is blamed on the Kembleford physician. Father Brown must figure out who sent them in order to save his friend from the gallows.
Episode 10
A day out at a local hill climb track ends with one of the drivers killed in a car crash. When Father Brown will not stop investigating, an infuriated Sullivan resolves to put an end to his meddling for good.