Detective Murdoch investigates the apparent murder of an inventor who is found sitting in a chair he invented. That chair was meant to provide a mild electrical current as a rejuvenation technique but Dr. Grace is certain that he was in fact electrocuted. He had a young woman with him the night he died but the investigation leads him to inventor Thomas Edison and the main suspect - his son Thomas Edison Jr. Meanwhile, the mayor tells Inspector Brackenreid to speak to Murdoch about Julia's plans to run in the upcoming election - fully expecting he will exercise his authority as her husband. Murdoch makes it clear to everyone that he has no intention of interfering and will support Julia in her campaign.

Suspicions fall on Murdoch when his unpleasant neighbour is murdered.

Murdoch investigates the stabbing murder of a doomsayer on the eve of Halley's Comet.