* CaliforniaDoubling: Though the stories are set in and around Shrewsbury, England, filming actually took place on specially constructed sets in Budapest, Hungary, because very little of Shrewsbury's Medieval architecture remains.
* FakeNationality: Englishman Creator/DerekJacobi as the Welsh Brother Cadfael.
* TheOtherDarrin: Sheriff Hugh Beringar is played by three different actors in the course of the series: Creator/SeanPertwee (Series One), Eoin [=McCarthy=] (Series Two and Three), and Anthony Green (Series Four).
* RealLifeRelative: Creator/DerekJacobi's long-term partner, Richard Clifford, plays the glover in St. Peter's Fair.
* ReferencedBy: Creator/LennyHenry spoofed the show with his "Cadfool" sketch, in which he played Brother Cadfael as a hard-boiled, snarky, cigar-smoking homicide detective.
* WhatCouldHaveBeen: Creator/IanHolm was originally cast as Cadfael, but owing to production delays, he had moved on to other projects by the time the series was ready to begin.