Father Brown

Father Brown (Mark Williams) arrives at a police event and runs into Inspector Mallory (Jack Deam) who clashes with his former boss DCI Webb (Colin Mace). Mrs McCarthy (Sorcha Cusack) is shocked to see dioramas of murder scenes - what sick mind comes up with something like this? Wilber Lesser (David Yelland) says his daughter Agnes (Mariah Gale) does, as a teaching tool in the art of crime detection, they're remarkable. Later Agnes takes Father Brown to her workshop and shows him a diorama depicting the death of her mother, who fell down the stairs.

Mrs McCarthy (Sorcha Cusack) is delighted to have her daughter Joselyn (Eva Feiler) visit but Father Brown (Mark Williams) suspects there's something untoward about her unscheduled appearance. Meanwhile at The Crimson Feather club, manager Maurice (William Travis) lends some money to one of his dancers, Verity (Letty Butler). She's going to be a very busy girl paying it off...The next morning Mrs McCarthy finds that Joselyn has disappeared -- only a note and long red feather remain. Bunty (Emer Kenny) examines the feather and says that one place springs to mind...

As Father Brown (Mark Williams) approaches Kembleford's mobile library, Ada (Holly Bodimeade) emerges to ask for help. Margaret (Elizabeth Berrington) lies under a pile of books, pinned beneath a metal shelving unit. Father Brown is relieved to find that she's still alive. With Margaret now safe in bed, Mrs McCarthy (Sorcha Cusack) insists that she help in the mobile library until Margaret's better. Her husband Graham (Andrew Greenough) shows them out through his photography shop, bumping into his scruffy assistant Lewis (Thomas Pickles).

Professor Ambrose goes to see his old friend Father Brown to ask for help -- he's been followed ever since he came into possession of the diary of the university's architect. It claims that the location of the alchemist's secret is hidden in a riddle -- the key to the lock to the door. Mrs McCarthy and Bunty  accompany them to Gloucester University where Principal Malcolm allows student Timothy to borrow a ceremonial key. When the absent minded Professor goes missing, Father Brown sees if he's with Timothy.

Recently released from prison, Sid buys a gun outside his caravan. The next day Father Brown reunites Sid with Bunty (Emer Kenny) and Mrs McCarthy (Sorcha Cusack), who insists on cooking him a hot meal. When Sid leaves suddenly, Father Brown follows him to a function where Edward Reece (Simon Shepherd) is honouring his latest judicial appointee Giles (David Reed). Sid confronts Giles, his former defence barrister, accusing him of burying a witness statement which suggests that his supposed victim of assault was coerced into incriminating Sid.