So crazy extreme medicine brought him back?
I got the probe that was fooling around with his mind to fool around with a brain that had been dead for 8 days. Maybe it did more but for now it seems like it's the source of the Tahiti story after he broke down.
I think the IV bag with blue crap was super soldier serum. Despite struggling with guns he seems physically improved a fair deal. Not sure what the green thing was. The symbols on that rock slab....I have no idea.
It seems pretty obvious right now that the Clairvoyant is tech based to 'see everything' kinda like the machine in Person of Interest. I guess Tahiti was out of reach.