wannall I have little to add to the other reviews that have pointed out the lamentable fact of this film's undeserved obscurity. It's a bit hard to describe or categorize because it is such a relaxed combination of light to oddball comedy plus a first rate mystery being pursued by an uncommon sleuth (Terry-Thomas in top form) and his American "sidekick" (Alex Nicol doing a competent job with an unconventional assignment as an actor).It is common to say that they don't make 'em like this any more. In this film's case it's also true that they never made so very many like this at all. I won't pretend that it's brilliant, though Terry-Thomas's performance probably qualifies, but it is the obvious product of a clear vision, a strong hand at the helm, and a very able crew. Once it started it kept me amused and engaged constantly.What fun! If you have any affection for British comedy or light mystery, do not miss it

ronevickers This is a cracking, lost gem of a film which features a screen stealing performance from the inimitable Terry-Thomas. The film manages to combine mystery and shards of comedy in equal measure, and the pace never flags from start to finish. In the lead role, Terry-Thomas is simply superb and produces a memorable performance. In fact, he demonstrates yet again that he was probably the most underrated comic actor in the movie business. In lesser hands, the lead character of Archie Bannister could have been a complete flop and the film wouldn't be anywhere near as good. However, with Terry-Thomas on absolutely top form, the film is a joy to watch. It's anyone's guess why it hasn't received a wider showing over the years. If you get a chance to catch it, then don't miss it. Heartily recommended!

John Orland I was Director of Advertising for the North American theatrical distributor of "A Matter of Who," Herts Lion International Corp. We wanted to have a premiere in Hollywood, on Hollywood Blvd. but couldn't find an available theater. So, against all advise, we held the premiere at the Crest Theater in Westwood near the UCLA campus -- the star: Terry-Thomas, red carpet, searchlights, etc. It was the first time a premiere was held in Westwood, California, then considered a second run venue. After that, dozens of major movies premiered in Westwood, and many big movies still do, but "A Matter of Who" with Terry Thomas was the first one that started this trend.

dbborroughs (Potential Spoilers ahead) Actually the WHO of the Title is the World Health Organization as well as the question as to which person is responsible for a small pox outbreak. Terry Thomas stars as the "germ detective" who stumbles upon a case of small pox on a flight into England. The man who has the disease is a recently married oil man who is returning to England and takes ill on the flight. Quarantined the doctors realize what the deal is and try to track down where he might have caught the disease. However things become complicated and potentially dangerous when two more people elsewhere in Europe come down with the disease. As Thomas tries to track down the common source of the infection (the disease takes two weeks to incubate so its very likely that all three victims have something in common) things become more complicated as people with questionable backgrounds and Arab ministers get brought into the mix.This is a super little mystery that I happened to stumble across by accident. Being a fan of Terry Thomas I decided to give the film a go. Both funny and suspenseful this is a great little thriller that keeps you watching to the very end (I loved that I didn't know where it was going and was glad to just follow along). The joy here is Thomas, who plays WHO's best expendable mind, the guy who knows his stuff, who is constantly fired but always rehired since he knows what he's doing. As one character comments there is more to the man then just his eccentricities. This is a super little film. Its one of those that you need to put on a list and keep an eye for or to do a little digging to find. Its just a great deal of fun.