Sister Boniface Mysteries is a British cosy mystery detective period comedy drama television series, created by Jude Tindall, which is produced by BBC Studios and BritBox. It is a spin-off of Father Brown, as the Sister Boniface character was introduced in a Father Brown episode (Series 1, Episode 6: "The Bride of Christ"). A 10-episode first series premiered on 8 February 2022, on the BritBox streaming service, and released in the UK on the UKTV Drama channel later in 2022. Sister Boniface Mysteries was commissioned for a second series, which began streaming in the US on Britbox on 3 April 2023. Filming began on series three 22 June 2023.