The Olivier Award-winning Mischief Theatre Company returns to the small screen with another festive spoof. After mauling JM Barrie's classic Peter Pan last year, disaster-prone am-dram troupe the Cornley Polytechnic Drama Society has been blacklisted by the BBC. Determined not to accept the ban without a fight, the group resolves to force itself back onto the screen by hijacking the jewel in the corporation's Christmas crown - a live production of A Christmas Carol, staged by an infinitely more esteemed cast. What follows is an anarchic hour of TV in which the performers quickly find themselves out of their depth, with no idea how to direct a live studio, or handle the special effects necessary to bring Dickens' perennial festive favourite to life. Plus, there's the small matter of the real cast, who are less than impressed at having their screen-time stolen by a band of inept replacements.