Masterpiece Mystery!: Grantchester Based on The Grantchester Mysteries by James Runcie, Grantchester stars James Norton (Happy Valley, War and Peace) as Sidney Chambers, the charismatic, charming, crime-fighting clergyman, and Robson Green (Strikeback, Wire In The Blood) as his partner in crime, Detective Inspector Geordie Keating. This MASTERPIECE MYSTERY! Series hearkens back to a simpler England, when WWII had just ended, Elizabeth II was the new queen, the death penalty was still in force, homosexuality was illegal, and the local vicar was a pillar of the community. Tessa Peake-Jones plays Sidney's indomitable housekeeper Mrs Maguire; Morven Christie portrays Sidney's glamorous friend Amanda; Kacey Ainsworth returns as Geordie's wife Cathy; and Al Weaver reprises his role as curate Leonard Finch.