Picture shows actors dressed as Arthur Conan Doyle's classic Sherlock and Watson
Detective drama will return for a festive special in 2015 followed by three new episodes in 2016
It might be going darker say the writers
'Breaking Bad' dominates but Benedict Cumberbatch and Martin Freeman both honoured
"It's a record-breaking run!" says executive producer Steven Moffat
Watson actor hints at festive one-off
Co-creator says schedules for all major players are being negotiated
Creator Stephen Moffat previously claimed he would not rule out casting actor in BBC1 series
Freeman currently stars in TV adaptation of 'Fargo'