Season
Season 5 Episode
- Season 4 For Your Ice Only
- Season 4 Happy New Year!
- Season 4 Fly on the Wall
- Season 4 Bully Bust
- Season 4 My Sweet Ride
- Season 4 Der Kinderlumper
- Season 4 Sidetracked
- Season 4 Primal Perry
- Season 4 Mind Share
- Season 4 Backyard Hodge Podge
- Season 4 Bee Day
- Season 4 Bee Story
- Season 4 Great Balls of Water
- Season 4 Where's Pinky?
- Season 4 Phineas and Ferb's Musical Cliptastic Countdown Hosted by Kelly Osbourne
- Season 4 Knot My Problem
- Season 4 Just Desserts
- Season 4 La Candace-Cabra
- Season 4 Happy Birthday, Isabella
- Season 4 Love at First Byte
- Season 4 One Good Turn
- Season 4 Phineas and Ferb: Mission Marvel
- Season 4 Thanks But No Thanks
- Season 4 Troy Story
- Season 4 Druselsteinoween
- Season 4 Terrifying Tri-State Trilogy of Terror
- Season 4 Face Your Fear
- Season 4 Cheers for Fears
- Season 4 Steampunx
- Season 4 Just Our Luck
- Season 4 Return Policy
- Season 4 Live and Let Drive
- Season 4 Phineas and Ferb Save Summer
- Season 4 Father's Day
- Season 4 Imperfect Storm
- Season 4 The Return of the Rogue Rabbit
- Season 4 It's No Picnic
- Season 4 The Klimpaloon Ultimatum
- Season 4 Operation Crumb Cake
- Season 4 Mandace
- Season 4 Phineas and Ferb: Star Wars
- Season 4 Lost in Danville
- Season 4 The Inator Method
- Season 4 Night of the Living Pharmacists
- Season 4 Tales from the Resistance: Back to the 2nd Dimension
- Season 4 Doof 101
- Season 4 Act Your Age
- Season 4 Last Day of Summer
Phineas and Ferb - Season 4 Episode 47 Act Your Age
7.89 48 minutes It's been 10 years after the events of the present, and Phineas must decide what university to go to. After discovering that Isabella had a crush on him for years, Phineas must reach her before she leaves for college and express his true feelings for her. Meanwhile, Doofenshmirtz has a mid-life crisis.
