Sherlock (2010– )
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The Sign of Three 

Sherlock tries to give the perfect best man speech at John's wedding when he suddenly realizes a murder is about to take place.


Colm McCarthy

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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 Morstan
Vinette Robinson ... Sgt Sally Donovan
Lara Pulver ... Irene Adler
Alistair Petrie ... James Sholto
Alice Lowe ... Tessa
Yasmine Akram ... Janine
Oliver Lansley ... David
Ed Birch Ed Birch ... Tom
Jalaal Hartley Jalaal Hartley ... Photographer


As Lestrade fumes over his constant inability to convict the Waters gang of bank robbers, Holmes prepares for his role as best man at Mary and John's wedding. His speech, initially bizarre, turns out to be a moving tribute to his friend whilst he also contributes two anecdotes of recent cases, both unsolved. The first concerns a young guardsman whose life John saved after he was the victim of a 'locked room' attempted murder. The second involves a man who uses the identities of the recently deceased to date different women. As he looks around the wedding party, Holmes suddenly realizes their connected solutions, which also involve Watson's former commanding officer, disfigured war hero Major Sholto. Written by don @ minifie-1

Plot Summary | Plot Synopsis


Crime | Drama | Mystery


TV-14 | See all certifications »

Parents Guide:

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Release Date:

26 January 2014 (USA) See more »

Company Credits

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Technical Specs


Sound Mix:

Dolby Digital


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Did You Know?


This story begins six months after the previous episode, Sherlock: The Empty Hearse (2014). See more »


When Mary and John are greeting guests at the reception, they greet the same couple twice - an elderly woman in a large white hat and bright pink jacket and a man in a light gray suit. See more »


[first lines]
DI Lestrade: [leaving a couthouse] They just walked out of there.
Sgt Sally Donovan: Yeah, I know, I was sort of sitting next to you.
DI Lestrade: The whole Walters family, they just walked right out of there.
Sgt Sally Donovan: Again, I was in the room.
DI Lestrade: How do they always manage that?
Sgt Sally Donovan: They're good.
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References Pulp Fiction (1994) See more »


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Written by Calvin Harris
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User Reviews

Sign of weakness
17 January 2014 | by jc-osmsSee all my reviews

After the less than triumphant return of Sherlock in the first of the three new stories in the new series, this, the second of them, failed even more (or is that less) to impress me.

Awkwardly attempting to blend Watson's surprise wedding with an awkward plot involving an "invisible-man" murderer, it really does get too tricky-wicky and clever-Trevor for its own good.

The first half-hour is wasted on the build-up to Watson's wedding, taking in a disastrously organised stag night by Sherlock and a lot of unnecessary, unconvincing comedy. Coincidentally the would-be murderer turns up on Watson's wedding day in a plain-as-day disguise, but not before an excruciatingly long and boring best-man's speech cum plot exposition ramble by Sherlock.

The use of narrative gimmicks, particularly graphics, is overdone while someone also forgot to write a dramatic or action-packed ending too.

It has to be said that the standard of this previously original and brilliant show appears to have dropped significantly in this series thus far. Neat re-workings of Conan-Doyle titles and motifs are all very well but the old boy would never have padded out one of his tales like this.

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