Holmes returns to England and must stop a member of Moriarty's gang who is trying to assassinate him.
Holmes is called on when the young heir of a reticent duke goes missing from his exclusive prep school.
The Prime Minister asks Holmes to help recover a stolen letter which could lead to war if released.
Holmes is challenged to decipher the mystery of an obscure family document detailing an enigmatic ritual.
Holmes is called to a manor house to investigate the death of a country lord who was murdered with a poker.
Holmes investigates the disappearance of a respectable city man who has been spotted in an opium den.
