Nathanial Parker and Sharon Small star in a fourth season episode of the Inspector Lynley series, "The Seed of Cunning," from 2005. After a doorkeeper is found floating in the Thames with his hands tied behind his back, DI Lynley and partner Havers start questioning people. Turns out the victim had problems with gambling, but before any conclusion can be drawn, there's another murder.
Suspects abound here, and the problem eventually centers around a committee due to make a determination about missile defense to buy, the American or the European, and an old school chum of Lynley's is head of the committee.
As usual, the detectives' personal situations mix with the professional. I've watched these out of order, so imagine my surprise when I found out that at this point, Lynley has married Helen (I always thought he could do better) but they are separated and he can't find her. Havers is meeting men through a dating service.
Very good episode in a wonderful series. A hunky leading man always helps, but the scripts truly are good.