"As a forensics specialist he's hired by the state for the police, he wouldn't have a key, he's not authorised to arrest so would have no buisness with one, he's either gotten it from Doakes, or managed to use a tool such as a saw.
There will be a weapon in the shack, the gun that the latino drug dealer had in his belt when Dexter killed him, Dexter won't have disposed of that yet, he dumps the bodies only in bags, nothing so far indicates he dumps anything but the bodies.
Doakes may have access to a weapon and may be able to break out of the chicken wire part but not out of the actual shack as the windows are barred up and the door in a firedoor, reinforced."

"The
problem is, Dexter is too attached to Harry's code right now. He doesn't
want to be the one to kill Doakes. If he were thinking clearly, he'd kill
Doakes and leave him in the cabin with the cocaine, as if he'd been double-crossed
and killed. As it is, it looks like he's going to plant evidence that implicates
Doakes. It's not enough.

The more I think about it, we have two wild
cards in the mix - Lila, who's a psycho, and LaGuerta, who's so in love with
Doakes that she has put her career at risk. Lila is going to drug Angel and
use him as an alibi while she sneaks out and tries to set Rita's house on
fire - I'd bet money on it. Even if Doakes dies and is accused with all
of the crimes, LaGuerta will spend the rest of the series trying to prove
his innocence. The worst possible scenario is that he get to talk to her
one more time and name Dexter.

Somebody is going to find that cabin
two episodes from now. Is it Lila, LaGuerta, the feds, Miami cops, Deb? All
good possibilities, but my money is on Lila. That would really screw things
up. "

"Well - I don't think the painting is in the cabin - I think it's her apartment. She does appear to find the cabin, though. Maybe that is Angel getting a commendation - maybe he shoots Doakes? I thought I was looking at a funeral. Wishful thinking, perhaps.

Lundy looks perplexed - I don't like that. He needs to stop thinking now.

Dexter is shown in his kill outfit jumping over the rail at the cabin - so is he not hurt that badly? He changes clothes and appears to get on with his day. One pic shows Doakes loose, but another Dex has a gun on him and he's in shackles.

What's the Deal with Dex and Lila at the Aquarium? That is Lila isn't it, not Rita? Is he now catching on to how crazy she is? Does he know she found the cabin? Has he seen the painting? Can we pile a little more stress on Dexter at this point?! Damn!"

"Joe Driscoll was a genetic match to Dexter, remember? Harry might have had a dark side, though. It would take more than guilt to make someone train a serial killer to avoid detection - unless he liked the idea of someone getting rid of serial killers."