SEASON FINALE: Part 2 of 2. The guest shot by Kevin James’ former The King of Queens co-star, Leah Remini, continues, as Kevin Can Wait concludes its freshman season. And James and Remini continue to be paired on an undercover mission, a plot bringing back the woman who played the wife of a TV character to the next show starring her former TV “husband.” The most famous time that happened on TV, Suzanne Pleshette slipped in as a surprise, unbilled guest star on the finale of Newhart, reteaming with her former TV spouse from The Bob Newhart Show. Still, after all these decades TV’s finest finale…