Kovac is sick of treating people who are not seriously sick as with things he has had to oevrcome, it is nothing. He is out of himself and meeting with Erin does not make it better.
Abby's brother is back and... he looks fine but I am not sure. And Carter - he wants to go somewhere in middle of nowhere to help people and Abby does not like it too much. And that man he met in the previous episode - he is back and this time he takes the money and leaves - and it is quite sure the money did not go to the right place.