The kids-and-Eliot is something we've seen before -- remember that scene with Eliot and the kid at the hospital who was being abused, I think it was last season? There's a definite inference that can be made from that. Whatever it was, I wouldn't be surprised if it was a situation where Eliot felt helpless to stop what happened.

I did like the reuse of Alice White as a pseudonym for Parker, and meeting up with the FBI agent again was cool.

Nate's only hesitation re: a given scheme is: would he do it to achieve his goal? If the answer is yes, then pretty much he's going to do it. He figures his team can handle it -- else he wouldn't order them to do it. If they really have issues, they know where the door is. I'm not as creeped out re: the implication because it feels like something Parker would've asked about; we just didn't see it.