This seems to be a recurring issue with CSI miami... They never really explain the status of Calleigh and Delko...and we're always left kinda like 'huh?" ... they go episodes without even mentioning it... then we're supposed to understand that they have or haven't been together for the past x amount of weeks... I have noticed this in the past as well.. esp. the beginning of last season when Delko had first come back I remember him and Calleigh having a weird conversation... just another classic 'csi miamism' where they pick and piece random character development and never really go all the way with it. ...due to football delays, I haven't been able to watch yet so I can't really respond to 2nite's episode...but still, from past history w / the show..I am not too surprised by what you have said.