Well, it was kind of a double--they could've easily put the last two together and made it a single 2 hr episode. They just chose to split it in half. The last few minutes were a bit too rushed, though, I agree about that. Like how did Mike get the boy when he was with Jesse? They kinda skipped over that.
I think it was assumed that Jesse traveled to Ireland(with Charlie) under an assumed name, using funds generated by Barry and IDs that a friend of Sam's came up with so he could drop Charlie off with Michael and Fiona, who had made there way there via a submarine they hijacked from an international drug runner. Duh.