The closing scene of last night's terrific episode of Breaking Bad gave us a glimpse at Walter White. The meek, unsteady, unsure of himself Walter White. The man shocked at what he just went through with, that Walter White.

Not the uber confident and cocky Heisenberg who kicked off "Say My Name."

But the black hat and sunglasses will return on next Sunday's summer finale, as Walt makes it his mission to protect himself and his empire by erasing Mike's guys in prison. Watch the official AMC trailer now for "Gliding Over All."

And then check out the following sneak peek, which posits Walt in a coffee shop across from Lydia and raises the question of just how many loose ends he has to tie up:

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.