i wasn't until you mentioned it. but it's only been two episodes into the season. i'm sure they'll have a storyline where she breaks up with Morgan for being a jerk (mostly due to the intersect taking over) but then when Morgan finally gets it out of his head, they'll be all lovey dovey again.

I was a little surprised that she was not anywhere to be found in the first episodes of season 5 but it was great when she returned, I had missed her because I ship her with Morgan and she is Casey's daughter after all... She deserves to be on the show ;)