S4·E21 One Good Turn
Core
Aired August 9, 2013
Synopsis
Candace and Stacy compete in Phineas and Ferb’s Ultimate Obstacle Course. Doofenshmirtz plans to humiliate his brother, the Mayor.
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Frequently Asked Questions
When did Season 4 Episode 21 of Phineas and Ferb air?
Season 4, Episode 21 ('One Good Turn') originally aired on August 9, 2013.
How long is Season 4 Episode 21 ('One Good Turn')?
The episode follows the standard broadcast runtime for Phineas and Ferb.
What happens in Phineas and Ferb Season 4 Episode 21?
Candace and Stacy compete in Phineas and Ferb’s Ultimate Obstacle Course. Doofenshmirtz plans to humiliate his brother, the Mayor....