Counterpart
Just wrapped up the first series of this. I quite enjoyed it, despite the fact that 'intrigue' isn't my usual go to genre. Cast is absolutely cracking. Definetly ramps up towards the end, though mainly it has some weird kind of pacing issues, like there's certain plot threads that needed to come together at certain points so some are dragged out to keep on hold and some are sped up. I dunno, hard to explain without going deep into spoilers.
I guess something I've liked is it's ultimately quite a sci-fi show, a core part is parallel earth, but it's more of a cold war spy thriller. And up until the final episode there's not much in the way of weird tech (and even then all it really is is a conference camera I guess). Oh except the hand scanner/cleaner things on the other earth.
Unfortunately can't properly watch it over here in UK, but in US you can watch it on every Nemesis favourite TV channel. So if you're wanting a 10-episode show to have a crack on it's a good one to start on.