As if this episode wasn't "Holy shit, what the hell?" enough, the preview for next week is even more so. Intense.
I could see Saul being the mole because he's lost so much over the agency.
I thought he was the mole ever since his weird behavior in the interrogation room. After all, the polygraph spiked when he gave the answer concerning the razor blade.
However, as TJ said...as part of the bigger picture, it wouldn't make much sense. Maybe it's possible he slipped the guard the razor blade, but isn't the actual mole. Not sure if that could work, unless he had some sort of sympathy for the guard
Saul does seem to have something more going on with him, and I think his relationship with his wife/ex wife was primarily a device for us to rationalize his otherwise-strangebehavior.
I didn't see the preview for next week's but the reveal at the end of this one was fucking great. Curious as to what Brody's involvement was, or is, with this all.