It is difficult to overestimate the importance of this lady in Sherlock’s life – he had been living in her house for more than 20 years! And, perhaps, this is the only female he had such a long-term and close relationship with. Despite the fact that Mrs. Hudson suffered from the strange habits of her famous tenant, she put up with everything. She treated Holmes with an immense respect and did her best to help him in his investigations.

This studio is named after, though minor, but major in political status, character – the Prime Minister of Great Britain. As a true lord, he is able to appeal to patriotism so that Watson is ready to immediately jump into action. And as a true aristocrat, he prefers when he makes conditions but not somebody else.

The apartment is named after Sherlock's assistant in the investigation of the most mysterious case of the Baskervilles' hound. Cartwright is a fourteen-year-old teenager, active, quick-witted who, like any boy, is eager to experience a risky romanticism of the detective business.