At first I didn't think so but now I'm not so sure. I mean, he didn't strike me as the person who would let either Harold or his son mourn him needlessly but if he thought it was protecting them? If he felt a reason to go even deeper to ground than Harold has?

Just this image of John looking up at the camera and it feeling like someone, a real person, was looking back. It would be an epic twist, too. And it would add some new spice to the budding partnership of John and Harold because basically John has started filling the void Nathan left in Harold's life.