This is the first close-up of the villain. It is very dark and you can barely make out the features of his face. There is a small bit of rim light around the sides of his hood, hinting that if he'd take his hood off, we might see who he is. He wants to remain hidden while he does his evil deeds.
After the first close-up, we now get and extreme close-up of his mouth. In this shot he seems to be speaking in tongues. One half of his face is lit while the other half is in shadows. His mouth is filling the frame because it is the focal point of his crime. He's using his words to coerce the victim into killing herself. His mouth is the weapon. Even though we cannot completely see his face, we can see that his front teeth are crooked which is the only identifier we have at this point.
This shot is a medium long-shot establishing that Sherlock Holmes is nearby to try and stop the villain and gather more information about the villain. The columns are lit more that Sherlock because it shows that he is hiding. Most of his body is in shadows because he does not want to be detected.
The camera cuts to a medium close-up to intensify the action that is about to happen in the scene. His face is framed in the columns and the light on his face is just enough so that he is seen spying on the villain.
The next three shots are establishing shots of the men who have surrounded the villain to protect him. These shots are as if they were the view of Sherlock. The shots show that Sherlock is outnumbered. Each shot is cut quickly to intensify the overwhelming number of men Sherlock spots.
There are some backlights lighting up behind the men and some soft fill lights above them, but there are soft shadows everywhere to convey the suspense and mystery. The people in the shots are difficult to make out because they work with the villain.
This one is described above with the other two, but the shot only frames one person. In this shot, the person is walking in from out of the darkness. This shot shows that more people are coming in the room.
A man is sneaking up on Sherlock but Watson suddenly attacks the man and Sherlock quickly turns to assist. The man can barely be seen because he is trying to be discrete. These shots are Medium shots and are still in the shadows because the people in the main area are still unaware of their presence. This light is soft and seems to be coming from the main area. There are key-lights in the men's faces just enough so we can see what is happening. In the second one, Sherlock seems to have a backlight from the larger area.
This shot is a medium close-up of Sherlock and Watson taking out the attacker. Their faces are lit better than before because we can now see that the team is complete with Watson in the picture. More lighting represents that together, they are ready to take on the villain.
This shot is a medium shot of the team. It is angled upward to establish that the men are strong and brave. Also, they had just succeeded in taking out an attacker. They are both equally framed which represents a partnership. The lighting is still low because they are still unknown to the others in the building.