Television News 'Sherlock' scribe Mark Gatiss pens Christmas ghost story for BBC 12/24/2018 "The Dead Room" -- a Christmas ghost story starring Simon Callow, Anjli Mohindra, Susan Penhaligon and Joshua Oakes-Rogers -- will premiere on BBC Four on Monday. Read More RELATED NEWS Jimmy Fallon's 'The Tonight Show' dropping to only four nights a weekAshley Tisdale announces birth of her second childSelena Gomez is a billionaire TAGS: Mark Gatiss Anjli Mohindra Sherlock