Aiden Turner has been fired from AMC. Now, if Pratt had a heart, Aidan would find the recuperating Greenlee that David is hiding, she'd have amnesia and Aidan would "rescue" her. The two of them would ride off into the sunset without Ryan ever finding out she's still alive. No more far fetched than some of the stuff that's being written. That would give AT a decent sendoff and still leave the door open for both to return when AMC needs characters to fill in the void left by those actors staying in NYC. Just don't give him some lame exit or, worse, do the Julia Barr thing and just pretend he was never there.