Annoyed at waiting in really long lines at the return counter, Doofenshmirtz invents a "Back-to-the-Store-inator" to send things back to the store where they came. Meanwhile, Phineas and Ferb stage an extreme batting challenge their friends take place in, and Candace's obsession to bust coincides with her and Jeremy's visit to the Extreme Water Park.
Elenco: 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 , Kari Wahlgren , Olivia Olson , Ariel Winter , John O'Hurley , Jane Carr , Malcolm McDowell , Barry Bostwick , Allison Janney , Madison Pettis .