Visiting relatives of the Flynns' neighbors bear an uncanny resemblance to Candace, Phineas and Ferb. Meanwhile, Perry finds himself in the middle of Dr. Doofenshmirtz's family reunion.
Casts:
Vincent Martella, Thomas Brodie-Sangster, Ashley Tisdale, Dan Povenmire, Dee Bradley Baker, Alyson Stoner, Bobby Gaylor, Maulik Pancholy, Caroline Rhea, Richard O'Brien, Kelly Hu, Mitchel Musso, Jeff 'Swampy' Marsh, Tyler Alexander Mann