Phineas and Ferb Season 1 Episode 40 The Monster of Phineas-n-Ferbenstein 2007
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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.
- Released: 2008-10-17
- Runtime: 12 minutes
- Genre: Animation, Comedy, Family, Sci-Fi & Fantasy
- Stars: Vincent Martella, Thomas Brodie-Sangster, Ashley Tisdale, Caroline Rhea, Dee Bradley Baker
- Director: Darrin Drew, Jeff 'Swampy' Marsh, Dan Povenmire, Danny Jacob
