Mark Taylor (Robert Bathurst) is a television sitcom writer. Other than episode one, where he is shown working on a script and references to a show of his that had aired during a dinner with Robert and Tracy the night before, his work is hardly mentioned. Mark is quick-witted, and the stand-up sequences indicate that he thinks in one-liners. However, this proves to be the downfall of his marriage with Becky, who says that she didn't sign on to become his "lawfully wedded straight man". In one episode, Mark jokes about worrying if his virginity will heal back; Becky articulates her frustration by responding "What page is that on?" Identifying his insecurities, she points out that the "thing about someone who uses humour as a weapon, is not the sense of humour, but the fact that they need a weapon". In interviews, Bathurst has compared Steven Moffat to his character: Mark is "a man whose wife leaves him because he talks in one-liners. And Steven Moffat's wife had just left him, because he talks in one-liners."