For a some time, they have had problems on ER with low opinion and they are not good with patients - to, now it has to change. Luka has lately, anyway, taken Neela under his wing and tried to teacher her to become better doctor. And it looks to me that she is starting to have some crush on him.
Ok, Abby is back but she is still quite traumatized and wants to run away, until she meets a quite charming med student on EL and returns..
And Sam.. She is sick and tired that Luka tries to control her life but in the end, everything falls back where it used to be.