Season 4 · Episode 21
One Good Turn (4x21)
Aug 9, 2013
Episodes · S4
E1For Your Ice Only (4x1)
E2Happy New Year! (4x2)
E3Fly on the Wall (4x3)
E4Bully Bust (4x4)
E5My Sweet Ride (4x5)
E6Der Kinderlumper (4x6)
E7Sidetracked (4x7)
E8Primal Perry (4x8)
E9Mind Share (4x9)
E10Backyard Hodge Podge (4x10)
E11Bee Day (4x11)
E12Bee Story (4x12)
E13Great Balls of Water (4x13)
E14Where's Pinky? (4x14)
E15Phineas and Ferb's Musical Cliptastic Countdown Hosted by Kelly Osbourne (4x15)
E16Knot My Problem (4x16)
E17Just Desserts (4x17)
E18La Candace-Cabra (4x18)
E19Happy Birthday, Isabella (4x19)
E20Love at First Byte (4x20)
E21One Good Turn (4x21)Now playing
E22Phineas and Ferb: Mission Marvel (4x22)
E23Thanks But No Thanks (4x23)
E24Troy Story (4x24)
E25Druselsteinoween (4x25)
E26Terrifying Tri-State Trilogy of Terror (4x26)
E27Face Your Fear (4x27)
E28Cheers for Fears (4x28)
E29Steampunx (4x29)
E30Just Our Luck (4x30)
E31Return Policy (4x31)
E32Live and Let Drive (4x32)
E33Phineas and Ferb Save Summer (4x33)
E34Father's Day (4x34)
E35Imperfect Storm (4x35)
E36The Return of the Rogue Rabbit (4x36)
E37It's No Picnic (4x37)
E38The Klimpaloon Ultimatum (4x38)
E39Operation Crumb Cake (4x39)
E40Mandace (4x40)
E41Phineas and Ferb: Star Wars (4x41)
E42Lost in Danville (4x42)
E43The Inator Method (4x43)
E44Night of the Living Pharmacists (4x44)
E45Tales from the Resistance: Back to the 2nd Dimension (4x45)
E46Doof 101 (4x46)
E47Act Your Age (4x47)
E48Last Day of Summer (4x48)