All characters (and their motives) are believable and interesting. So much so, that each character could star in their own movie.
Tensions build in way that constantly leave the audience with anxiety over the chaos that is about to explode.
Even though it's about how one event can set the course for generations to come, it is excellently well-paced.
Danny and John's scene on the beach in the second to last episode.
The last episode masterfully walks the line between humor and tension.
It's hard to see the show's story not jumping the shark next season. The show's structure (flashbacks and flashforwards) seems to be better as a self-contained series. It's hard to believe the show will survive without Danny.