Startling moment: hearing Nimoy saying “Jim!” and meaning Phelps, not Kirk.
It was fun seeing all the 1970s era cutting edge tech - those huge reel-to-reel tape recorders! Room-sized computers spitting out printouts! Greg Morris's clunky electronics. And of course the teeny reel-to-reel tape recorders hidden in weird places, ready to self-destruct after Phelps listens to his instructions.
All of that – plus of course the early 70s hair and makeup and then there was Paris' bad beard – do date the show.
But one thing does not seem at dated:
The blithely cynical RealPolitik assumption of “Of course, we have every right to go and interfere with/manipulate the affairs of other countries any way we want to.”
The fictional part, of course, is there’s no blowback or unforeseen consequences.