A group of foreign delegates visiting a fog-bound London for an international disarmament conference are bumped off by someone imitating the Gaslight Ghoul, a Victorian Mass murderer, whose notoriety has inspired a group of professional men to start their own Gaslight Ghoul club, its aim being to unmask the original killer. Steed joins the club to discover the identity of the latter-day culprit.
Just reading the above is enticing enough; fog, horse drawn carriages, cobbled side streets, men with beards and cloaks - a killer at large. There's plenty of atmosphere, some genuine tension, and of course the usual Avengers quirkiness. Tara King, in particular, is really good in this one. She's quite an energetic one, looking quite baffled as things unravel. The only disappointment is the fight sequence between Steed and the dastardly fiend. With steed's fencing skills I expected a lengthier sequence. Nigel Green and the smooth Guy Rolfe co-star.