Created by Ray McKinnon (who wrote the Stephen Gyllenhaal-directed premiere), “Rectify” remains a master class in nuance — in small looks and long pauses that say more than pages of dialogue, where even a trip to the local convenience store fosters a sense of unease. In that respect, the series is frequently deceptive in terms of how much the story advances from week to week, since it regularly feels like not much is happening.