The Monster of Phineas-n-Ferbenstein Phineas and Ferb : Season 1 Episode 40
TV-G Disney Channel 15m
Aired: October 17th, 2008 @ 6:00 PM EST on Disney Channel
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.
