Grantchester - Season 4 Episode 6

Will, upset by his family tragedy and faced with life-changing choices, seeks distraction in Geordie's world. A strange new case unfolds: the murder of a "Teddy Boy" at a dance hall, which in Geordie's opinion is proof that the country has truly gone to the dogs. The dead boy's pockets reveal a library card from Geordie's daughter Esme's school, and even more disturbing – a picture of Esme herself. Esme claims ignorance, but Will knows something is up as he's spotted her hiding a love letter.