The League reaches northern Mongolia where it reunites with Skinner and plots 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 and identify him as Professor James Moriarty, longtime archenemy of genius detective Sherlock Holmes who had changed identities following his alleged death at the Reichenbach Falls. Sawyer is taken hostage by an invisible Reed; Quatermain shoots the latter, only to be fatally stabbed by Moriarty. Moriarty flees but Sawyer shoots him and the formulas sink into the icy water. Quatermain then dies.