In the first episode of its final lap, Breaking Bad included a snappingly tense scene in which Walter (Bryan Cranston) was confronted by his brother-in-law, DEA agent Hank (Dean Norris). In last week’s second returning episode, Hank confronted Walt’s wife, Skyler (Anna Gunn), in a scene that was just as astoundingly intense. This week, what’s next? (Hank confronting Aaron Paul's Jesse, for starters.) And when does Walt Jr. (RJ Mitte) enter the informed loop? Because that, more than anything else, is where Walter’s Achilles heel resides.