1. 'The Leftovers,' HBO

Having read the Tom Perrotta novel, I wondered how the heck HBO would do a second season, let alone a third, after using up all of the source material in the first season. But each season got better, with the story evolving from a quirky science fiction tale to a heartwarming romance between characters played by Justin Theroux and Carrie Coon. Why it earned so little Emmy recognition befuddles me.