Just because you are separated and seeing other people does not mean you cannot work together. David Arquette will guest star on the season finale of Cougar Town this year. I'm guessing it will probably also be the last episode of the series. When you love a show you do not wait until almost the end of sweeps to bring it back. The show begins its run on Valentine's Day and the finale at the end of the season is probably also a way for co-executive producer David to make his mark on the show in front of the camera before it goes buh bye forever.