Interpol Calling tends to be one of the more neglected of the I.T.C. crime/adventure series, and having watched it all, was pleasantly surprised, and would recommend it. A partnership between Rank and the Jack Wrather Organisation, the latter were no doubt influential in casting Charles Korvin as Inspector Duval. He proved an excellent choice, bringing a touch of European sophistication to a highly intelligent, perceptive official with a congenial sense of humour, but whom is also able to look after himself when faced, as he often is, with violent desperate criminals. These include protection racketeers and other extortionists, heroin traffickers, blackmailers and many others whom have either killed for gain or to cover up incidents in the past. His cases take him all over the world, while, by contrast, his invaluable assistant, Edwin Richfield's bow-tied Inspector Mornay rarely leaves the Paris office. Who needed databases when Mornay's filing cabinets seemingly held records of every known criminal and unsolved crime in existence? There are also one or two attempted 'impossible crimes' such as the driver who murders his wife while contriving to be seen in a car rally miles away at the same time, and the case of the body, verified gone overboard in the Mediterranean, which turns up shortly afterwards in the English Channel.
Doubtful if Interpol really bore much resemblance to this, yet many of the plots seem more realistic than in some comparable series' of the time and the briskness of pace aids in the suspension of disbelief. It goes without saying that as with similar British shows it had the huge benefit of superb character actors, though in this case many go strangely uncredited. One example is future Bond Girl Zena Marshall, previously high in cast lists for over a decade and Duval's assistant in a couple of early episodes, but whom is not given a name, never mind a credit.