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Sherlock

Sherlock: Series 4

  • 2017
  • 3 episodes
  • 1h 30m

The fourth series begins with the nation’s favourite detective, the mercurial Sherlock Holmes, back once more on British soil, as Doctor Watson and his wife, Mary, prepare for their biggest ever challenge - becoming parents for the first time.

Series 4 of Sherlock premiered on January 1, 2017 and has 3 episodes, from "The Six Thatchers" to "The Final Problem". The last episode aired on January 15, 2017.

Where to watch Sherlock

In the United States, you can stream Sherlock on Hulu, Philo, AMC+ and BritBox. It is also free on KQED. You can also buy it on Amazon Video and Google Play Movies. It is on streaming services in 57 countries.

Where to watch

Episodes

  1. Episode 1The Six ThatchersAired January 1, 2017

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

    • 1h 29m
    • Directed by Rachel Talalay
    • Written by Mark Gatiss

    Guest stars

    • Una Stubbs Mrs. Hudson
    • Rupert Graves DI Greg Lestrade
    • Louise Brealey Molly Hooper
    • Mark Gatiss Mycroft Holmes
    • Andrew Scott Jim Moriarty
    • Tanya Moodie Ella
    • Amanda Abbington Mary Morstan
    • Lars Mikkelsen Charles Magnussen
  2. Episode 2The Lying DetectiveAired January 8, 2017

    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.

    • 1h 29m
    • Directed by Nick Hurran
    • Written by Steven Moffat

    Guest stars

    • Una Stubbs Mrs. Hudson
    • Rupert Graves DI Greg Lestrade
    • Louise Brealey Molly Hooper
    • Mark Gatiss Mycroft Holmes
    • Amanda Abbington Mary Morstan
    • Lindsay Duncan Lady Smallwood
    • Sian Brooke Elizabeth
    • Toby Jones Culverton Smith
  3. Episode 3The Final ProblemAired January 15, 2017

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

    • 1h 29m
    • Directed by Benjamin Caron
    • Written by Mark Gatiss and Steven Moffat

    Guest stars

    • Una Stubbs Mrs. Hudson
    • Rupert Graves DI Greg Lestrade
    • Louise Brealey Molly Hooper
    • Mark Gatiss Mycroft Holmes
    • Andrew Scott Jim Moriarty
    • Amanda Abbington Mary Morstan
    • Simon Kunz Sir Edwin
    • Art Malik Prison Governor

Season cast