Bearing a title which includes the in-word of the time "spy", but otherwise no other relation to the plot, to this fan of "The Man From U.N.C.L.E." this was rather thin fare and escaped my brain almost the minute it entered it.
Unlike others in these spliced-for-European-cinema features, this effort has very few redeeming features. There are few action set-pieces, no race-against-time death-trap from which to escape, no Mr Big" megalomaniac villain to tilt our heroes against and barely even a big-name celebrity cameo to divert the viewer's attention (unless you count Vera Miles, probably the biggest name in the cast here).
David McCallum in particular gets almost nothing to do, chasing cats around "London", Robert Vaughn as ever, gets amongst the ladies but hardly memorably as the chase is on for a youth-regeneration invention. Even Mr Waverley's stepping out to join Solo in escaping from the bottom of a wine vat (unoriginally used twice for the same purpose) barely registers its novelty value.
Somewhere in the cast you'll catch sight of Yvonne "Batgirl" Craig, James "Scottie" from "Star Trek" Doohan, but otherwise this adventure has potboiler written all over it and the awful soundtrack which plays variations from "Rule Britannia" throughout to attempt to fool us that we're all in Swinging England doesn't help either.