It was good episode on characters development - everyone got a little, everyone had something to do. But overral, I do not feel it was too good or too special.
Susan is having birthday but it is ruined as she founds out there are rumors about her and when her sister shows up - it is disaster.
It is not better for Greene either who is trying to keep her marriage up but her wife is always somewhere else when he is there and when she is home, he is on work. It can be complicate and it looks like he cannot find a way out.
And Carol and Doug... it almost looks they are back on old days but that is just moment of weakness for Carol to remind her what all will go wrong with Doug and so she is back for her doc and Doug takes it hard.
So, Carter, in the end, is only one having good day. Getting two (?) bottles of champaign and then drinking it with Susan.. doing a procedure he had never done before..