 The League reach northern Mongolia, where they reunite with Skinner and plot to destroy M's factory with explosives.Nemo and Hyde rescue the scientists, Skinner sets the explosive charges, and Mina battles and eventually kills Dorian by exposing him to his portrait.Quatermain and Sawyer confront M, identifying him as Professor James Moriarty, Sherlock Holmes's archenemy who had taken on a new alias following his alleged death at the Reichenbach Falls.