SEASON FINALE: What a way to go out for the season. Chris Matthews is on the panel, John Cleese is the scheduled top-of-show guest, and Seth Rogen joins the panel midway through. And while there are plenty of hot topics for Maher and company to consider, the political highlight is immigration reform – and the third-rail topic, one of Maher’s specialties, is the swirling controversy surrounding Bill Cosby.