(S01E10) "Just when you thought things couldn't get any weirder..." - Peter to Olivia, on seeing a dead guy embedded in a wall

Wow, a lot of things started to come together in this episode. Let's analyze:

The guy in the wall. So we now know that the experiment we saw in last week's episode - where the guy grabs an apple through the wall of a safe - is being used on a larger scale. Specifically, to steal things out of bank vaults. Only, not everyone gets back through the wall.

The safety deposit boxes. We pretty much knew that the contents were mysterious things that would bring ... something ... to light. But what we didn't know is that the contents of those safety deposit boxes were actually put there by Walter years ago. And that the box numbers were the same numbers he chants at night while he's trying to go to sleep -- the Fibonacci Sequence we learned about at the beginning of this season. Way to bring that back around.