Leftovers (10pm, HBO) - HBO debuts a dour new series based on the Tom Perrotta novel of the same name. It was co-created by Perrotta and Damon Lindelof (“Lost”) and takes place after a mysterious rapture-like event vanishes 2 percent of the world’s population – child’s play if you’ve been watching “The Last Ship” on TNT, though the tone here is much, much darker.
Also on tonight . . .