Sorry to say, this is another confusing, hyperactive-episode. I've always liked Roger Moore, especially as the later Simon Templar in the long-running 1960's British TV-series "The Saint", a role he made-his-own. Although devilishly-handsome, he appears quite-young here, almost-boyish. Overall, I think he was fine as the assigned-inspector on the case-in-question. I'd only make-the-observation that I feel he overdid his facial-expressions, i.e., they seemed a little too mannered & over-elastic through most of the show, thus tending to overemphasize his reactions to whatever he was told or discovered, such as puzzlement, skepticism, usage of wry-humor, frustration, etc. I mentioned how I found the plot confusing; well, much of the initial set-up for the premise occurs in the opening-scene of the Chief Inspector's office, played by a pre-"Batman" Alan Napier. His dialogue toward Moore is spoken very-rapidly in typically-filmic British-fashion, which I couldn't easily-follow & just gave-up trying, somewhat-hampering my enjoyment of the rest of the story, since I didn't get the real-premise of it. The back & forth about Hazel Court's necklace, it's mysterious-whereabouts, etc., became tedious to keep-track-of, to the point I no-longer cared. So many shady-characters, too, passing in & out of scenes, only-added to the confusion. Normally, I'd enjoy the Britishness of an episode, as I'm a true- Anglophile, but between a much-too-complex set-up & my feeling of a lack of caring about those darned-diamonds, the show didn't do it for me. I never cared-enough. The ending was clever, I admit. I'd actually seen this episode many years-ago but had forgotten how it played-out. In short, a potentially- promising-premise with much-too-rapid dialogue, confusing-actions, heavily-talky with overexcited-accents, along-with Moore's never-static facial-contortions made me bow-out, involvement-wise, early-on---a British-concoction of the old-school that simply wasn't my cup-of-tea!