Phineas and Ferb season 5

The fifth season revival of Phineas and Ferb premiered on Disney Channel on June 5, 2025, and was released on Disney+ in the United States the following day. Created by Dan Povenmire and Jeff "Swampy" Marsh, the series focuses on Phineas Flynn and Ferb Fletcher (Vincent Martella and David Errigo Jr.), two stepbrothers on a summer vacation, while their older sister Candace (Ashley Tisdale) attempts to bust them. Meanwhile, the boys' pet, Perry the Platypus (Dee Bradley Baker)—who lives a double life as a secret agent—thwarts the evil scientist Dr. Heinz Doofenshmirtz (Povenmire). The returning supporting cast includes Caroline Rhea as Linda Flynn-Fletcher, Richard O'Brien as Lawrence Fletcher, Alyson Stoner as Isabella Garcia-Shapiro, Bobby Gaylor as Buford Van Stomm, Maulik Pancholy as Baljeet Tjinder, and Marsh as Major Monogram.

Phineas and Ferb originally ended with its fourth season in 2015, with Povenmire and Marsh continuing to do other work until Povenmire signed a deal with Disney Branded Television at the start of 2023 for a fifth and sixth season. Development began in May, with voice recording commencing by September. The writers' room featured both new and returning writers, and notably saw Vanessa Doofenshmirtz's actress Olivia Olson join her father Martin as a writer. The season has received praise for its return to form, entertainment value, cast performances and characters, although some criticised its lack of reinvention.