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A rainy day causes Phineas and Ferb to cancel today's activities. To pass the time, Grandpa Reg tells the story about one of Ferb's Victorian ancestors, Ferbgor, who helped a scientist, Dr. Phineastein, create a monster. While locked in his own building, Doofenshmirtz tells Agent P the story about his ancestor, Jeykll Doofenshmirtz, who made a concoction brewed to turn him into a monster.

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Meet The Monster!

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