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Phineas and Ferb
Season 4 · Episode 21
One Good Turn
7.011mAugust 9, 2013
Candace and Stacy compete in Phineas and Ferb’s Ultimate Obstacle Course. Doofenshmirtz plans to humiliate his brother, the Mayor.
Episodes
- Episode 1For Your Ice Only
- Episode 2Happy New Year!
- Episode 3Fly on the Wall
- Episode 4Bully Bust
- Episode 5My Sweet Ride
- Episode 6Der Kinderlumper
- Episode 7Sidetracked
- Episode 8Primal Perry
- Episode 9Mind Share
- Episode 10Backyard Hodge Podge
- Episode 11Bee Day
- Episode 12Bee Story
- Episode 13Great Balls of Water
- Episode 14Where's Pinky?
- Episode 15Phineas and Ferb's Musical Cliptastic Countdown Hosted by Kelly Osbourne
- Episode 16Knot My Problem
- Episode 17Just Desserts
- Episode 18La Candace-Cabra
- Episode 19Happy Birthday, Isabella
- Episode 20Love at First Byte
- Episode 21One Good Turn
- Episode 22Phineas and Ferb: Mission Marvel
- Episode 23Thanks But No Thanks
- Episode 24Troy Story
- Episode 25Druselsteinoween
- Episode 26Terrifying Tri-State Trilogy of Terror
- Episode 27Face Your Fear
- Episode 28Cheers for Fears
- Episode 29Steampunx
- Episode 30Just Our Luck
- Episode 31Return Policy
- Episode 32Live and Let Drive
- Episode 33Phineas and Ferb Save Summer
- Episode 34Father's Day
- Episode 35Imperfect Storm
- Episode 36The Return of the Rogue Rabbit
- Episode 37It's No Picnic
- Episode 38The Klimpaloon Ultimatum
- Episode 39Operation Crumb Cake
- Episode 40Mandace
- Episode 41Phineas and Ferb: Star Wars
- Episode 42Lost in Danville
- Episode 43The Inator Method
- Episode 44Night of the Living Pharmacists
- Episode 45Tales from the Resistance: Back to the 2nd Dimension
- Episode 46Doof 101
- Episode 47Act Your Age
- Episode 48Last Day of Summer