Breaking Bad does a great job building the tension the entire episode, letting the hints fester, until finally, the climax comes after everything is in place and we are on the edge of our seats, waiting to see how Walt will get out of his next jam. "Sunset" was a perfect example of this, taking Hank sitting outside Jesse's house, waiting for the RV to show up, to Walt inadvertently bringing Hank to the RV by telling Badger that they need to destroy the it.
Hank shows up, ready to search the RV with Hank and Jesse still inside. In the back of my mind, there was no way Hank would catch them, but arrest seemed imminently possible. Hank tries prying the door open as Walt frantically tries keeping it closed. The junkyard owner buys them time by using his surprising knowledge of the law (probably because he's knee-deep in shady business) to get Hank to back off and get a warrant. This allows Walt to call Saul, who saves them by giving Hank an erroneous call about Marie in the hospital. The episode brought us back into the past as Walt examines a few items in the RV and when it is destroyed in the end, it's a bittersweet moment, the end of an era cooking meth in the RV, and also the point where they are moving on to bigger things.
The Cousins keep showing up at Cluck's, menacing customers and sitting there. If I'm not mistaken, this is the first time we've heard them speak and they still don't talk much, using brief phrases and sentences to get the finer details across. Their demeanor and expression is really what is important: they're angry and they want something. Gus talks to them at sunset and the Cousins now have another goal. Gus, proving once again how crafty and devious he is, convinces them to go after Hank, the actual killer of Tuco, getting rid of two problems at once.
Walt and his new assistant, Gale, are getting along very well. They both love chemistry, being in the lab, and they're both nerds. It's a match made in heaven! Damn you, Gus. Sooner or later, though, it'll break down just as every other relationship does.
There was a tiny bit of family drama with Skyler and Walt Jr. in there, but much less than in previous episodes. It many ways, it was like an episode of the first two seasons, where Walt and Jesse are at the center while the other characters didn't do much. "Sunset" didn't reach last week's character complexity, but had my heart pumping. I don't particularly like Hank, so the Cousins going after him came sort of as a relief, although I'll probably be squirming once the Cousins do track him down.