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Dr. Kirk Langstrom, a brilliant Gotham biologist studying bat echolocation, secretly experiments on himself to cure his worsening hearing loss. When the serum restores his senses but begins transforming him into the monstrous Man-Bat, Kirk becomes the center of a citywide hunt as Detective Harvey Bullock investigates the attacks, Francine Langstrom fights to save her husband, and Gotham’s criminals and scientists try to exploit the creature. Across two seasons, the series follows Kirk’s tragic loss of humanity as his mutation evolves beyond control.