I like the song playing in the closing scene with Walt (in Heisenberg form) in the parking lot telling the guy to stay out of his territory.
The Walter arc is fascinating. Will Walt quit cooking meth once he makes enough $, or is he becoming too addicted to being Heisenberg?
The re-kindling or evolving thing between Tyler and her boss -- ouch.
A man has to give attention and focus (and genuine affection) to his wife. It's a good feeling (and healthy) for both the husband and the wife. Win-win.