A battle of wits ensue as Sherlock faces down his arch-nemesis Moriarty. Can Sherlock out-wit his enemy and save John Watson? Watch more high quality videos on the BBC Worldwide YouTube channel here: http://www.youtube.com/bbcworldwide Subscribe to BBC Worldwide YouTube channel here: http://www.youtube.com/subscription_center?add_user=BBCWorldwide Welcome to the BBC Worldwide Channel - bringing you the best of British TV! Love Gavin & Stacey, Sherlock and The Mighty Boosh? The BBC Worldwide channel has them all and more - bringing you specially selected clips and full length episodes from the greatest shows on television. This is a channel from BBC Worldwide, trading as BBC Studios, who help fund new BBC programmes.