Season 1 • Episode 0

Episode summary unavailable.

Season 1 • Episode 1

A war hero, invalided home from Afghanistan, meets a strange but charismatic genius who is looking for a flatmate; it is London, 2010, and Dr Watson and Sherlock Holmes are meeting for the first time. A string of impossible suicides has Scotland Yard baffled - and only one man can help.

Season 1 • Episode 2

A mysterious cipher is being scrawled on the walls around London. The first person to see the cipher is dead within hours of reading it. Sherlock plunges into a world of codes and symbols, consulting with London's best graffiti artists. He soon learns that the city is in the grip a gang of international smugglers, a secret society called the Black Lotus.

Season 1 • Episode 3

A strange clue in an empty room, a blood-soaked car, a priceless Old Master, a deranged bomber. With the clock ticking, the curtain rises on a battle of wits between Sherlock, John and the shadowy stranger who seems to know all the answers...

Season 2 • Episode 1

Blackmail threatens the monarchy and Sherlock is about to meet the woman who beats him.

Season 2 • Episode 2

A hound from hell. Sherlock's most famous case. But is a monster really stalking Dartmoor?

Season 2 • Episode 3

The return of Moriarty. The crime of the century. Can Sherlock possibly survive?

Season 3 • Episode 0

Episode summary unavailable.

Season 3 • Episode 1

Two years on from reports of his Reichenbach Fall demise, Sherlock resurfaces as London comes under threat of a huge terrorist attack. John, though, has mixed feelings about his friend's shocking return.

Season 3 • Episode 2

Sherlock faces his biggest challenge of all – delivering a Best Man’s speech on John’s wedding day! But all isn’t quite as it seems. Mortal danger stalks the reception – and someone might not make it to the happy couple’s first dance. Sherlock must thank the bridesmaids, solve the case and stop a killer.

Season 3 • Episode 3

A case of stolen letters leads Sherlock Holmes into a long conflict with Charles Augustus Magnussen, the Napoleon of blackmail, and the one man he truly hates. But how do you tackle a foe who knows the personal weakness of every person of importance in the Western world?

Season 4 • Episode 1

Why is someone destroying images of Margaret Thatcher? Is there a madman on the loose? Or is there a much darker purpose at work?

Season 4 • Episode 2

Sherlock faces perhaps the most chilling enemy of his long career: the powerful and seemingly unassailable Culverton Smith – a man with a very dark secret indeed.

Season 4 • Episode 3

Holmes and Watson travel to Europe to escape Moriarty's vengeance.