My favorite show and it gets better with every rewatch. There are so many details in most of the scenes that reference future/past events so I’ve enjoyed it immensely rewatching it with new partners or friends who haven’t seen it.
The time travel gimmick really gets overshadowed by the humanity and the personal consequences of time travel.

I’d also like to recommend The Frog, an Iranian show which was surprisingly high quality and poetic.

Another fantastic non-US: Detectorists, a British show about two dweeby metal detectorists with charm galore and hilarious dialogue. Very wholesome!