Inspector Sullivan always regarded Father Brown as an irritant, despite all the murders the priest help solved.
The opening of the episode reveals that the fugitive on the run is no other than Inspector Sullivan who has turned to Father Brown for help.
Sullivan is wanted for the murder of young, clever and eager Detective Constable Albert who is found stabbed. A visiting detective from Rhodesia is put in charge of the case. Sullivan thinks that a cabal of the good and the great in Kembleford might want to see him put away on trumped up charges as he and DC Albert were investigating the murder of a journalist who thought he had got a scoop.
A thoroughly enjoyable episode, as Sullivan finally admits defeat and realises Father Brown has his uses. Even Sid who is due in court reluctantly helps out.