Way before he started popping holes in people, I thought Mike was acting weird. It was specifically the moment when he woke up and started telling his story to Jack. He's talking about the others' camp and where he believed the kids were being held and then he stutters and hesitates, and then he says, "I couldn't save him." He was talking about Walt. Right there, was when I thought to myself, that was weird, the way he said that, and his eyes shifting...

I think there is more going on then just Mike doing this to get walt back. Mike has been let in on the master plan, and now he is party to it.