Next week: everyone hugs Carter as he returns to the ER; Luka tells Lisa to put in a chest tube, and she tells him she can't because she's a nurse, and he yells, "GO!"; Weaver offers her "a learning opportunity that'll put [her] way ahead"; Carter tells Lisa that "this place grows on you," and Lisa makes a joke too lame to repeat; Luka tells Lisa she's a good nurse, but that she could be a great doctor. Then they have sex in the ambulance bay. Just kidding.