The Ship of Theseus

Episode 9 (1x9)

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Shin’s father, Bungo, disappears and falls under suspicion of attempted murder when Mikio is found unconscious in the back of his police car. It looks as though Bungo will be branded a criminal after all, even though Shin has prevented the murders at the elementary school. But the true murderer has saved his most evil and devious plan for last!