Season 4 Plot
The nun who is the police’s secret weapon is back. Crime solving is her habit! The wine-making, moped-riding nun investigates more ugly deeds in beautiful surroundings. It’s the mid-1960s in the quaint Cotswold village of Great Slaughter, but strange things are afoot. A killer scarecrow stalks the streets, all the women call a general strike and the police embark on something called “team building”. Sister Boniface is looking forward to a wholesome weekend away with the sisters, only to be confronted with yet another murder.
Sister Boniface Mysteries Season 4 aired on September 25th, 2025.
Where to Watch 'Sister Boniface Mysteries' Season 4
Season 4 Episodes
1. Biff! Pow! Zap!
Sister Boniface investigates a sabotaged stunt when the lead actress in TV show “Foxman” plummets to her death.
2. A Murder of Crows
Sister Boniface investigates when a killer scarecrow wreaks havoc at the annual Scarecrow Festival.
3. Are Ye’ Dancin’?
When a member of a ceilidh band is slain Sister Boniface must catch the killer at Mrs Clam’s birthday party.
4. Killer Heels
Sister Boniface must tread carefully when the owner of the local shoe factory is found murdered.
5. Let the Games Begin!
Sister Boniface investigates when a bucking bronco goes haywire on the set of a hit TV game show.
6. There's No "I" In Slaughter
When a police team-building trip takes a sinister turn Sister Boniface must discover which of their rivals is a murderer.
7. The Happiest Family
Sister Boniface investigates when the nuns’ wholesome weekend away is overshadowed by hedonists and murder.
8. And Then There Were Nun
Can Sister Boniface catch the killer of a fellow nun before she leaves Great Slaughter for good?
