57punches:

Possible explanations for the Victorian!lock promo pic:

1. They’ve decided to set the entire special in Victorian England because why the hell not. 

2. Sherlock and John are invited to a fancy-dress party and they come because of a case.

3. They’re trolling and it’s a scam.

4. The Doctor is visiting 2015 London so Sherlock and John steal the TARDIS and fuck off to 1895 to explore their inner gay.