The Great Indoors

http://tvlistings.zap2it.com/tv/phineas-and-ferb-the-great-indoors-canderemy/EP009488470198

Perry's entrance to his lair
None.

Background Information
http://www.toonzone.net/forums/showthread.php?p=3772737

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