Phineas and Ferb 4×39
Isabella unintentionally admits her feelings for Phineas in a letter. Meanwhile, Doof invents an inator to help change his misfortune
Serie: Phineas and Ferb
Director: Dan Povenmire, Jeff 'Swampy' Marsh, Joe Orrantia
Guest Star: Allison Janney, Alyson Stoner, Ariel Winter, Ashley Tisdale, Barry Bostwick, Bobby Gaylor, Caroline Rhea, Dan Povenmire, Dee Bradley Baker, Jane Carr, Jeff 'Swampy' Marsh, John O'Hurley, Kari Wahlgren, Kelly Hu, Madison Pettis, Malcolm McDowell, Maulik Pancholy, Mitchel Musso, Olivia Olson, Richard O'Brien, Thomas Brodie-Sangster, Tyler Alexander Mann, Vincent Martella