Television's 50 wittiest catchphrases are counted down. Featured: clips and interviews with the stars who delivered the indelible lines, including Jeremy Piven, Dana Carvey, Neil Patrick Harris, Jean Stapleton, Ron Howard, Andy Griffith, Jackie Gleason, Regis Philbin, Bob Newhart, Penny Marshall, Polly Holliday and Redd Foxx. Jane Krakowski narrates.