Please tell me there is a proper ending in S3?
Yes there is. S3 arguably is a bit of a curate’s egg. It does tie up a lot of the loose ends, which is cool if you like that sort of thing, but some of them aren’t really essential to the main plot, and they feel like they went out of their way to tidy up some story lines that was part of say; series 1 so that you end up watching 15 minutes of sort of half remembered plot but really were happy to accept as a Mcguffen just to move the story on a bit.
Second, by the end it really does start to scale Mount Portentous with a diversion to the ridge line of Pomposity…Many of the characters start making metaphysical speeches that sound important and full of meaning, but turn out to be a bit dull and pointless. Like “Our future is filled with the mistakes of our pasts” which sounds deep and meaningful but well; isn’t really. Lots of the dialogue in a couple of Eps is entirely this, and it does get a bit wearisome after a while
But: it’s still a better treatment of time travelling than most manage and the hidden story line that the whole thing hinges on is really quite human, which makes for a nice change.