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.

"The O.W.C.A. Files" is a standalone hour-long special focusing on the organization's best secret agent, Agent P (also known as Perry the Platypus), and his fellow animal agents.When an evil mastermind from Major Monogram's past, Professor Parenthesis, launches an attack on The O.W.C.A. by incapacitating the animal agents with robotic fleas, only Agent P and his agent trainees can save the day.