Duncan was the only person to do two stints on the show - 1980 to 1984, and 1985 to 1986 - and the first to appear in a sex film. An actor, Duncan was hired to take over John Noakes's action-man role, but parents objected to his scruffy jeans and sweaters. He played Charlie Chaplin in a musical and was also in Barnum. Now 38, he has a wife, Annie, and three daughters, and still does the odd spot of TV.