This has two plot lines going. The continuing saga of Skyler and Walter and the divorce. Skyler makes a devastating discovery when cleaning up the room where Walter is staying. Hank continues his relentless search for the RV that was the methmobile. That means eyes on Jesse. It seems only a matter of time. And Walter is given a huge opportunity. Jesse is a liability. Hank's efforts are now an obsession. Things keep moving on a grander scale.