Starring David Walliams in a TV version of his own book, it tells the story of 12-year-old Joe who has everything he could ever want from his billionaire father Len except for a friend. The cast includes John Thomson (The Fast Show, Cold Feet) as Len and Catherine Tate (Doctor Who, The Catherine Tate Show) as Sapphire Diamond, a 40-something hand model who still likes to prete...