The final part of the series based on J.K. Rowling’s (written under the pseudonym Robert Galbraith) adult crime books airs tonight. The show follows one of the cases undertaken by injured war veteran turned PI Cormoran Strike (Tom Burke from 2016’s TV adaptation of War & Peace) alongside his assistant and secretary, Robin Ellacott (Holiday Grainger, who starred in the live-action reboot of Cinderella and My Cousin Rachel). Last week’s episode ended on a thrilling cliff-hanger as Strike watched CCTV footage of Lula’s murderer and identified him. Tonight, long-buried secrets are revealed, putting Strike and Robin in danger as they close in on the killer.