Of special relevance to Trek? Last night I watched The Project Strigas Affair with of course William Shatner and Leonard Nimoy. I wouldn't be surprised if it contained a moment of TV history, the first on-screen meeting between Nimoy and Shatner.
Yes, this is true. In fact, it's probably the one factoid that was most widely known about
The Man from U.N.C.L.E. before the movie came out (aside from the fact that Ducky from
NCIS was in it).
The original title was, after all, "Solo." Ilya was strictly meant to be a second banana.
Heck, not even that. Originally Illya was just a guest star, one of the various supporting UNCLE staffers who had one or two brief scenes in the pilot. He came off so well that they immediately decided to promote him to a regular. Although his presence was intermittent in much of the first season, since so many scripts had already been written on the assumption that Solo would live up to his name.
Speaking of Trek, wasn't Ricardo Montalban in one of those early B&W episodes?
Yes, in episode 12, "The Dove Affair." He played a Balkan secret-police chief (with an inexplicably Mexican accent, as always) who was a friendly rival with Solo as they competed for possession of the title McGuffin. Montalban returned in season 2 as a suave jewel thief in "The King of Diamonds Affair" -- his first appearance alongside John Winston (Chief Kyle), who also appeared with him in
both "Space Seed" and
The Wrath of Khan (the only person outside the main Trek cast to do so). "King of Diamonds" also featured Nancy Kovack (Nona from "A Private Little War") doing the worst English accent in an episode full of bad English accents, if not the worst English accent in the history of television. (Kovack’s delivery migrates freely between Prim English Governess and Scarlett O’Hara, with various unidentifiable stops along the way. Everyone else faking an accent in the episode is at least managing to fake a consistent one, but Kovack can’t even settle on a continent.)