I was recently looking through some of my old posts and I came across Intelligent Murder Mystery Suspects. In it I look at the ITV version of The Labours of Hercules (with David Suchet) and the problem which arises from having the murderer be a genius, in terms of how you can possibly hide your murderer among plausible suspects. (I also take a look at the issue of how a detective can solve a mystery with genuine and apparent coincidences in it.)