Stay up to date with notifications from The Independent

Notifications can be managed in browser preferences.

Sherlock season four: How Mark Gatiss and Steven Moffat covered up The Lying Detective's huge twist

*SPOILERS* This article contains major details about the plot in episode two of Sherlock, season four

Roisin O'Connor
Monday 09 January 2017 16:14 GMT
Comments
Sian Brooke takes on an extremely versatile role in the drama series
Sian Brooke takes on an extremely versatile role in the drama series

Your support helps us to tell the story

From reproductive rights to climate change to Big Tech, The Independent is on the ground when the story is developing. Whether it's investigating the financials of Elon Musk's pro-Trump PAC or producing our latest documentary, 'The A Word', which shines a light on the American women fighting for reproductive rights, we know how important it is to parse out the facts from the messaging.

At such a critical moment in US history, we need reporters on the ground. Your donation allows us to keep sending journalists to speak to both sides of the story.

The Independent is trusted by Americans across the entire political spectrum. And unlike many other quality news outlets, we choose not to lock Americans out of our reporting and analysis with paywalls. We believe quality journalism should be available to everyone, paid for by those who can afford it.

Your support makes all the difference.

After that dramatic ending to episode two of Sherlock, season four, fans have been left shocked by the revelation that Sherlock and Mycroft have a secret (evil) sister.

Eurus, named after the Greek God of East Wind, was revealed to have been disguised as three different characters on screen, including as Watson’s therapist.

She also appeared as the daughter of episode two’s villain Culverton Smith, and of course, the woman Watson engages in a flirtation with.

Sherlock's demons are back to haunt him in the new trailer

‘Miss me?’ – Spot Culverton on the poster in the background, with Eurus in disguise flirting with Watson 

 ‘Miss me?’ – Spot Culverton on the poster in the background, with Eurus in disguise flirting with Watson 
 (BBC One)

The third Holmes sibling, played by Sian Brooke, reveals herself to Watson as Sherlock’s sister, then points a gun at him and shoots.

Sherlock co-creator Mark Gatiss, who plays Mycroft Holmes, said at a special Bafta screening that an extra sibling had been discussed for years.

“It started as a joke years ago that there was going to be a line in the first season where we were sketching in the Holmes family. But we thought we wouldn't do much and thank god we didn’t because it has given us this place to go.

“This was a huge thing to cast Sian as Eurus. We said to casting someone who should already be a huge star who has never had the breaks.”

Steven Moffat said that Brooke had to lie to her friends about what she was doing: “She has been on TV for two weeks and now finally she is allowed to say she is in this show.”

Director Nick Hurran explained: “We disguised her by... either you shoot from above, or in any of the transitions you delay how quickly you put the two together, apart from when you want to then tell that story.”

The final episode of Sherlock season four airs on Sunday 15 January at 8.30pm on BBC One.

Join our commenting forum

Join thought-provoking conversations, follow other Independent readers and see their replies

Comments

Thank you for registering

Please refresh the page or navigate to another page on the site to be automatically logged inPlease refresh your browser to be logged in