Cluedo

And Then There Were Nuns (3x4)

Air date: May 25, 1992

Sister Concepta, a nun visiting the Grange, goes to meet her maker. Not surprisingly, there is no shortage of motives on hand for killing the sister in god - with a spear, a shotgun, a cake knife, a parasol, a paperweight, or, just conceivably, a corkscrew.