Three minutes into "Gladys," the titular member of Guilty Remnant is dead. The episode's central event, her brutal murder, is already in the past. And in the long unwinding that follows, as the emotional, social, and political consequences of that terrible act reverberate through Mapleton and beyond, the gulf between those who need to remember the Sudden Departure and those who wish to forget it grows ever larger. "Grace period is over," Holy Wayne (Paterson Joseph) warned in the show's pilot, and though he meant to suggest the transformative power of his own charismatic presence, tonight's episode demonstrates the broader implications of his foreboding words. The chronological conceit of the series, picking up the thread of October 14th three years later, suddenly appears canny indeed. With "Gladys," an enthralling portrait of what happens when the urge to move on collides with the persistence of grief, The Leftovers joins the ranks of television's must-see dramas.