The color pilot for Solo (1963)
The original series title, no Imdb page. It's on the DVD (70m) but was shorted (50m) and broadcast B&W as The Vulcan Affair.
Good article: https://cult-tv-lounge.blogspot.com/2019/09/the-man-from-uncle-solo-1963.html
I don't have the DVD. I was checking torrents and came across it (Complete-Z0DiAC99). There are also two movies for Europe from double episodes.