This episode is so well researched, historically, and still so currently controversial that if you even try and elucidate any of the parallels with actual events, such as the mysterious code name that recurs, the post will be taken down. I know because I've tried. Someone, at least, would not want you to take too much notice of the plot. It's a heady mix of police work, crime, politics and history.
That's only the background of course! It's also excellent, suspenseful drama, thanks to the writing and acting. As well as the always compelling performances from regulars Kevin Whatley and Laurence Fox, at the top of their game, there is a most affecting portrayal by Anna Chancellor, showing a range of complex emotions in a difficult role.
There's also a chance to see an early Lucy Boynton, now a star of the cinema. Those, like myself, who have been long-term fans of Cherie Lunghi since her days at the Royal Shakespeare Company, can relish seeing her here in a typically elegant but also rather scary role.
There's a nice cameo from Lorcan Cranitch and a compelling performance by Mark Aiken. Dramatic tension is maintained through numerous plot twists but space is still left for the welcome touches of humour that always lighten each episode of Lewis.
Really not to be missed!