The Sixth Commandment

All four episodes of the crime drama which explores the real-life deaths of retired teacher Peter Farquhar (Timothy Spall) and his neighbour Ann Moore-Martin (Anne Reid) in the village of Maids Moreton in Buckinghamshire.

After volunteer churchwarden Ben Fields (Éanna Hardwicke) meets Farquhar, he instigates a relationship with the older man and then subjects him to repeated poisonings and mistreatment before ultimately murdering him.

When he then turns his attention to Moore-Martin, her niece Ann-Marie Blake (Annabel Scholey) becomes suspicious and contacts the police, leading to a series of terrible revelations.