Spoilers ahead.

TREAD LIGHTLY SON.

That shot of the wall with 'HEISENBERG' spray-painted in yellow sent a shiver down my spine. That definitely means that Walt's past actions are common knowledge. So was it Hank that exposed him? And why was Walt retrieving the ricin? Obviously he has to take someone out quietly, but who could it be? I've heard some people say for suicide but why would Walt use ricin of all things to commit suicide. So is it Hank? Or is it Jesse? Unfortunately, I think Walt has already killed Jessie by this point. So my best guess is Hank.

Speaking of Hank, when that garage door started to close... Oh my shit. That punch had the force of a thousand minerals packed behind it. I can't believe they had that confrontation this early in the season. Walt essentially admitted to Hank that he was Heisenberg--so what's Hank's next move? I don't think he can go to the DEA with this one. He has too many connections to Walt. So I say he goes at it lone wolf style. Action Hank.

I also think Jesse knew Walt was lying to him about what had happened to Mike. But how did Jesse know? Did Hank speak with Jesse first after realizing his connection with Walt? Or did Jesse just intuit that Walt was lying to him? I think it's the latter--Jesse just isn't accepting any of Walt's bullshit any more. That sent him over the edge.

Also funny to see Walt act so much like Gus (the towel before he vomited, his attitude towards Lydia at the carwash). The line between Walt and Heisenberg is completely indistinguishable at this point. They are the same person.

I can't believe we've gotta wait a whole week until the next episode.