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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.