Note: I just found out about this. So...

(WNJN) & (WNJN HD) (aka NJTV & NJTV HD) (Montclair, PBS station)

Thu. Aug. 21, 2014 8p-9p "Sitcoms": Joyce Randolph provides insight into Jackie Gleason; Marlo Thomas reminisces about her father, Danny; Andy Griffith on what made his show work; Mary Tyler Moore and Dick Van Dyke recount their work together.

Credit goes to tvguide.com

Thank you. Been waiting for this to repeat, because this episode is not shown on the PBS website.