I don't want to spoil the experience for you by raising expectations but it's one of my favorite shows of all time. It takes a while to warm up but the end of season 1 and all of seasons 2 and 3 are wild. I mention it because it was created by Damon Lindelof who co-created Lost and has a similar (so I'm told) off-kilter kind of world building. It's only 3 seasons and the story ends on it's own terms (not canceled or forced to go 10 seasons). I think there are a few other Leftovers fanatics on here who can chime in.