This long-running arts interview program, hosted for about a quarter-century by James Lipton, has moved from Bravo to Ovation, and Lipton, while remaining involved with the show, has turned over on-air duties to a series of guest hosts. Tonight, that guest host is Kelsey Grammer, and his guest is James Burrows, the best TV comedy director of a couple of television generations now. Not only did he direct Grammer in all of Frasier, and Cheers before that, but Burrows other prominent directorial credits include Friends, Will & Grace, and Taxi, and stretch all the way back to a few episodes of the original Mary Tyler Moore Show. A particular TV treat, of a conversation between two very talented friends.