Dan Hedaya returns as Nick Tortelli, the slimeball ex-husband of Carla (Rhea Perlman). When Nick demands that he receive custody of his oldest son, the usually combative Carla meekly acquiesces. The Cheers gang decides that it is high time to teach Nick that his word is not law. In another development, ex-lovers Sam (Ted Danson) and Diane (Shelley Long) return to one of their former romantic haunts. ~ Hal Erickson, Rovi