Television News 'Sherlock' begins production on fourth season 04/07/2016 "Sherlock" screenwriter and cast member Mark Gatiss confirmed Wednesday that production has begun on Season 4 of the contemporary detective drama. 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 Benedict Cumberbatch Martin Freeman Sherlock
