Sherlock (2010– )
44 user 18 critic

The Lying Detective 

Sherlock goes up against the powerful and seemingly unassailable Culverton Smith - a man with a very dark secret indeed.


Nick Hurran


Steven Moffat, Steven Moffat (created by) | 2 more credits »




Episode cast overview, first billed only:
Benedict Cumberbatch ... Sherlock Holmes
Martin Freeman ... Dr. John Watson
Una Stubbs ... Mrs. Hudson
Rupert Graves ... DI Lestrade
Mark Gatiss ... Mycroft Holmes
Louise Brealey ... Molly Hooper
Amanda Abbington ... Mary Watson
Toby Jones ... Culverton Smith
Lindsay Duncan ... Lady Smallwood
Sian Brooke ... Elizabeth (as Siân Brooke)
Georgina Rylance ... Cornelia
Tom Brooke ... Wiggins
Gina Bramhill ... Faith
Martin Savage Martin Savage ... Ivan
Katy Wix ... Nurse Cornish


As Sherlock attempts to comfort John Watson after his wife's death, entrepreneur and apparent philanthropist Culverton Smith tests a new drug on his employees and his daughter Faith to make them forget his confession that he plans to commit murder. Faith retains a partial memory and approaches Sherlock to identify a likely victim but her disappearance, and his descent into drug abuse, lands him in Smith's hospital and at his mercy. Though Sherlock is not as helpless as he appears and has his own way of trapping Smith, the final shock is reserved for Watson as his new therapist springs a terrible surprise on him. Written by don @ minifie-1

Plot Summary | Add Synopsis


TV-14 | See all certifications »

Parents Guide:

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Release Date:

8 January 2017 (UK) See more »

Company Credits

Production Co:

Hartswood Films See more »
Show more on IMDbPro »

Technical Specs


Sound Mix:




Aspect Ratio:

1.78 : 1
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Did You Know?


The picture behind Mycroft's desk is of young Queen Elizabeth II in the 1955 portrait "Queen Regent" by Pietro Annigoni. See more »


Lady Smallwood's first name was shown as Alicia in Sherlock: His Last Vow when Magnussen's details on her were displayed on screen. In the dialogue, however, her first name is Elizabeth. On the business card she gives Mycroft, however, her name is again Alicia. See more »


[first lines]
Therapist: Tell me about your morning. Start from the beginning.
Dr. John Watson: I woke up.
Therapist: How did you sleep?
Dr. John Watson: I didn't. I don't.
Therapist: You just said you woke up.
Dr. John Watson: I stopped lying down.
See more »


References The House of Fear (1945) See more »


Hymn to Joy
Written by Ludwig van Beethoven
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User Reviews

A great episode
9 January 2017 | by abhyuday-singh98See all my reviews

Most of the people were pretty much disappointed by last week's episode and were convinced that 2nd season was the last good season of the show. No promise of goodness was shown in the last episode and it presented itself as wastage of time as they only have 3 episodes per season. But after this episode, it seems that the previous episode was just a clever move to tease the audience as the writers knew that they'd be able to more than make up for it. This epitomizes the Sherlock we all love and wait for. CGI was incredible: the slow motion shots were well placed to represent the scenario appropriately. It was fun to see Sherlock as Quicksilver(I have a feeling that John Smith was somewhere involved in all this). Really, a fabulous use of technology. The acting also was unparalleled. Everybody expects a few deductions here and there, but this episode showed the emotional connect between John and Sherlock. Toby Jones did a good job being despicable. Desperately waiting for the last episode, more because of its name.

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