Doofapus

Doofenshmirtz turns himself into a platypus to defeat Perry, but finds it harder than he imagined.

Perry's entrance to his lair
None.

Background Information

 * http://www.twondemand.com/tv/disney-on-demand/svod/disney-channel/phineas-and-ferb

Continuity

 * Fifth time the word "Doof" is in the title name. ("Hail Doofania!", 'The Doof Side of the Moon", "Doof Dynasty", "Agent Doof")
 * Sixth time a title of an episode has only one word. ("Rollercoaster","Atlantis","Canderemy","Bullseye!" and "Excaliferb")

Cast

 * Vincent Martella as Phineas
 * Ashley Tisdale as Candace
 * Thomas Sangster as Ferb
 * Caroline Rhea as Mom
 * Mitchel Musso as Jeremy
 * Dan Povenmire as Dr. Doofenshmirtz
 * Jeff "Swampy" Marsh as Major Monogram
 * Richard O'Brien as Dad
 * Dee Bradley Baker as Perry