HomePeople Biography and filmographyJohn Challen Biography unavailable on TMDB. Movies (4)TV shows (5) Movies (4) Simulation Exercise1984 · Writer Lifelike1980 · Writer After the Solo1975 · Writer Headmaster1974 · Writer TV shows (5) Wuffer1983 · Writer Graham's Gang1977 · Writer HeadmasterHeadmaster1977 · Creator Playhouse1974 · Writer Play for Today1970 · Writer