When two nuns die in mysterious circumstances at St Agnes convent, Father Brown investigates with the aid of Sister Boniface, an eager young fan of detective novels.

When his priceless Blue Cross is targeted by the infamous criminal Flambeau, Father Brown takes the initiative to try and save his soul. But is he walking into a trap?

When Lady Felicia finds a stripped and injured man stuck up a tree, Sid is implicated as the perpetrator. Can Father Brown prove his innocence, or has Sid gone too far this time?

After a murder at the Kembleford charity treasure hunt, general suspicion falls upon a bereaved man who wants revenge. However, Father Brown is determined to prove the man's innocence.

Father Brown joins the search when a girl who is believed to be radioactive goes missing overnight. But just who is responsible for her disappearance?

When the mayor drops dead during his speech at the Kembleford village fete, Father Brown deduces that he was deliberately electrocuted. Meanwhile, Mrs McCarthy's past comes back to haunt her.

When an ungodly man is murdered at the unveiling of a new church clock, Father Brown must find the killer before an innocent woman is sent to the gallows.

Father Brown becomes embroiled with a theatrical family when he discovers that a supposed tragic drowning was actually murder.

Soon after his poetry recital, Leonard Quinton is found hanging in the conservatory. When Father Brown realises that he could not have committed suicide, the search begins for a murderer.

When the Church of Apollo comes to Kembleford, Susie is drawn to their charismatic leader Kalon. After Kalon's wife is murdered, Father Brown must break his spell over Susie or risk losing her forever.