5. Benewig Cumberbatch

Remember what we said about Benedict looking forward to not having his trademark Sherlock hair in this special? Well, he got his wish as for the modern-set scenes the wavy locks he is sporting are actually a wig! Kudos to whoever made that, we would never have known…

4. It’s not the same plane

In those same scenes in which Benedict is wearing a wig, the plane he is in is also a fake. The production crew couldn’t get hold of the plane they used while filming ‘His Last Vow’ so they had to recreate it. Likewise, the airstrip the plane is located in could not be accessed this time around so the back-lot behind the studios stood in for it. Is anything in ‘The Abominable Bride’ real?!

3. Mark Gatiss, the blabbermouth 

It won’t be long now until Series Four goes before the cameras. As such, Moftiss have had the series mapped out for a while. To keep things top secret, the big twists aren’t written down before scripting begins. On set for ‘The Abominable Bride’, however, Mark Gatiss accidentally let slip a massive reveal in Series Four while talking to Benedict. Thankfully for him, Cumberbatch wasn’t listening!

2. Mycroft’s book

Mycroft’s notebook, with all those mysterious references in, has really got fans’ imaginations going, wondering what its significance is. Actually, we have seen it before. Right the way back in ‘A Study in Pink’ Mycroft had the exact same notebook. That is some pretty impressive pre-planning there, Moftiss. But what does it all mean…?

1. We won’t see Victorian Sherlock again

Since the end of ‘The Abominable Bride’ leaves it open for Victorian Sherlock and John to return, many have wondered if period-set Sherlock specials would become a regular thing. However, Mofftiss have confirmed that they have done everything they wanted to do with this setting in the special. Although they did joke that they could do a World War Two episode next…