HomePeople Biography and filmographyJohn Markus Biography unavailable on TMDB. Movies (1)TV shows (6) Movies (1) The FactsThe Facts1982 · Teleplay TV shows (6) The Zen Diaries of Garry Shandling2018 · Self Kristin2001 · Creator LateLineLateLine1998 · Creator The Larry Sanders Show1992 · Writer, Producer The Cosby Show1984 · Producer, Writer Taxi1978 · Writer