- Detective Murdoch finds that the man behind a flying machine that crashes in Toronto is none other than his old nemesis, James Pendrick. He learns that Pendrick is hoping to win a $1 million prize for the first controlled flight. A body is found in the rubble of the crash but someone is clearly out to steal his invention. Murdoch also has to deal with Ottawa-based spymaster Terence Meyers who says it's all a national security matter. Meanwhile, Julia returns from Vienna intent on practicing psychiatry. She's also hoping to have her marriage to D'Arcy annulled.
- Richard Mayhew leads an ordinary life in London when one day a girl named Door falls, injured, across his path. The next thing he knows, his life is gone and he's pulled into the fantastical world of London Below. Pursued by the murderous Messrs. Croup and Vandemar, Door and Richard with the help of Hunter and the Marquis de Carabas, attempt to find the Angel Islington, who kno...