Sherlock series four begins filming and fans are preparing for #Setlock

Sound the Sherlock alarm. Series four has officially begun filming, and that means one thing: #setlock is back.

Rise & Shine #sherlockians #setlock is underway 🙂 will it be a script read through today? #Sherlock S4 pic.twitter.com/sBXDFET6x1

— Anything Cumberbatch (@Anythingbatch) April 4, 2016

In case you’re not on the case, #Setlock is the phenomenon where hundreds of fans of the BBC1 show gather to watch filming, post pictures and share the joy of watching their heroes in action.

Amanda Abbington announced the news that filming for Sherlock series four had begun with these simple words.

And we are off… #setlock

— amanda abbington (@CHIMPSINSOCKS) April 4, 2016

Sherlock hair and make-up designer Claire Pritchard clearly had a busy day ahead, and had taken appropriate precautions.

Day 1 pic.twitter.com/HeRD5ij4qJ

— Claire Pritchard-Jones (@Claire_cpj) April 3, 2016

#Setlock has been controversial amongst Sherlock fans in recent years, with some worrying that their presence hinders filming, and others afraid of potential spoilers.

Thankfully, Sherlock fans are a pretty careful bunch, and aren’t about to go out of their way to spoil anybody’s fun.

Ah, erm. Also. People. Please don't post spoilers without tagging them. And don't bother cast and crew, please?! #SherlockSeason4 #setlock

— Maria (@stuffasdreams) April 4, 2016

PSA: Our usual #Sherlock reminder – we don't #Setlock, we don't share spoilers, and we don't share where filming is taking place…

— Sherlockology (@Sherlockology) April 4, 2016

Advice to avoid Setlock spoilers: Switch off picture previews in Twitter settings. Tweetdeck & Twitterrific allow muting hashtags and words.

— Vanessa (@EternallyDowney) April 4, 2016

That’s not to say people aren’t still excited.

#Setlock DAY ???????? #Sherlock #BenedictCumberbatch #MartinFreeman #season4 pic.twitter.com/kuuGcZAjfB

— Klaudia (@klaudia_cs93) April 4, 2016

Me in this moment #setlock pic.twitter.com/sn1Od6TcCk

— Arianna???? (@ruffalosmile) April 4, 2016

Really excited.

#setlock the fandom: pic.twitter.com/yFcMVLUiVH

— ash (@rebelwjthacause) April 4, 2016

ITS HAPPENING!!!!!!!! #setlock

— Giulia (@giubler) April 4, 2016

Will you be following #Setlock online this year? Or do you prefer to wait until the series starts? Tweet, Facebook and message us below with your thoughts.