3/3 Alone and defenceless, Sherlock and Dr Watson face their greatest ever challenge.
2/3 Sherlock comes face to face with the most evil man he has ever met.
1/3 Why is someone destroying images of the late prime minister Margaret Thatcher?
Sherlock and John investigate a ghostly bride who appears to have committed murder.
3/3 Sherlock Holmes crosses swords with Charles Augustus Magnussen, the king of blackmail.
2/3 Sherlock faces his biggest challenge of all - delivering a best man's speech.
1/3 Sherlock returns! But for Watson, it might be a case of 'be careful what you wish for'.
3/3 The return of Moriarty. The crime of the century. Can Sherlock possibly survive?
2/3 A hound from hell. Sherlock's most famous case. But is a monster really stalking Dartmoor?
1/3 Blackmail threatens the monarchy and Sherlock is about to meet the woman who beats him.