Laffan also became known as a television writer in the 1960s. "Bud" (1963) was a six-episode serial starring the music-hall comedian Bud Flanagan; "Castle Haven" (1969) was a serial for ITV about the residents of two converted Victorian houses in a seaside town in Yorkshire, featuring Roy Barraclough, Kathy Staff and Jill Summers. In 1984 he co-wrote with Peter Jones "I Thought You'd Gone", a sitcom about parents who wrongly believe their children have left the nest. He wrote episodes of several serials, and also television plays, including "Decision to Burn" (1971, starring Anthony Hopkins) and "The Best Pair of Legs in the Business", (1968, with Reg Varney as a holiday camp drag queen), which was remade as a feature film with the same title in 1972.