In 1981 John Challis introduced the public to the character of Boycie in Only Fools and Horses. The used car salesman became a popular foil for David Jason’s Del Boy and even spawned his own spin off series, The Green Green Grass. As an actor John Challis had a successful career before and after Only Fools and Horses, which he wrote about in his autobiography Being Boycie, but what would he reveal during “Stephan’s Six”?