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Phineas and Ferb
Season 1, Episode 40
Episode Title: The Monster of Phineas-n-Ferbenstein
Air Date: 2008-10-17
Overview:
The boys learn about one of Ferb's Victorian ancestors, who helped a scientist create a monster. Meanwhile, Doofenshmirtz recalls the story of his great-great-grandfather Dr. Jekyll Doofenshmirtz.
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