Episode 1: A Study in Pink

A war hero, invalided home from Afghanistan, meets a strange but charismatic genius that is looking for a flatmate; it is London, 2010, and Dr Watson and Sherlock Holmes are meeting for the first time.

Elsewhere, a woman in pink lays dead in a derelict house. She is the fourth in a series of seemingly impossible suicides. DI Lestrade is the best Scotland Yard has got, but even he knows that there's only one man who can help crack the case.

Episode 2: The Blind Banker

Mysterious ciphers are being scrawled on walls around London – from the glittering financial hub of the city to the heart of a travelling Chinese circus – and claiming a growing stream of dead victims.

Plunging into a world of codes and consulting with London's best graffiti artists in order to decipher what the ciphers mean, Sherlock and Watson soon discover that the city is in the grip of the Black Lotus, a brutal society of smugglers that must be stopped.

Episode 3: The Great Game

A crazed bomber pits his wits against Sherlock in a deadly game of cat and mouse as the lives of five hostages depend on the great detective cracking a series of riddles against the clock.

A 20-year-old murder, a blood-soaked car, a rediscovered Old Master worth millions – it's just the kind of adventure Sherlock and John relish, but who is behind these deadly puzzles? London becomes a battleground as Sherlock confronts the one person capable of beating him…