Phineas and Ferb team up with the Avengers to save the world from Dr. Doofenshmirtz and a group of dangerous supervillains.

Each day, two kindhearted suburban stepbrothers on summer vacation embark on some grand new project, which annoys their controlling sister, Candace, who tries to bust them. Meanwhile, their pet platypus plots against evil Dr. Doofenshmirtz.

On the inevitable 104th day of summer vacation, the season — and the series — is quickly coming to an end, and it’s Candace’s last chance to bust her brothers; who build huge playground equipment for the finale of summer. She is quickly foiled, but when she goes to return a DVD to Vanessa and finds Dr. Doofenshmirtz’s Do-Over-Inator, she finds an opportunity to redo the day, which results in other consequences like rips in the space-time continuum, the shortening of days and the disappearance of her brothers.

It's the summer solstice, so Phineas, Ferb, and their friends decide to travel around the world in one day in an effort to create the "biggest, longest, funnest summer day of all time". But not everyone believes they can actually achieve what they have set out to do, especially Buford. Candace tags along because Jeremy is on a trip to Paris, and she fears that there he may meet other girls. Also, Isabella finds her affections for Phineas sorely tested when his steadfast focus on achieving his goal puts pressure on her. Meanwhile, Dr. Doofenshmirtz takes a father trip to Tokyo, Japan with Vanessa, but sets out with Perry and Major Monogram to find her when she joins Phineas, Ferb and the others.

Doofenshmirtz's latest "-inator" accidentally turns the citizens of Danville into contagious mindless repulsive pharmacists that look like him who run rampant all over town. Agent P and the kids must work together to save Danville and avoid becoming mindless repulsive pharmacists themselves.

Phineas and Ferb get trapped in an alternate dimension where the evil Doofenshmirtz rules the tri-state area. They must find a way back home with the help of their pet platypus named Perry, who they discover is a secret agent.

Follows Marzipan, a young elfling, and her mother Cinnameg, as Marzipan must believe in the magic of the season and goes on an adventure to rediscover the enchanted snow deer named Glisten and save Christmas.

Alienated Dylan throws off the shackles of his solitary life in an attempt to experience the highs and lows of existence chasing life before death.

Alienated Dylan throws off the shackles of his solitary life in an attempt to experience the highs and lows of existence chasing life before death.

After the Avengers are overtaken by a zombie plague, a desperate group of survivors discover the key to bringing an end to the super-powered undead, racing across a dystopian landscape and risking life and limb to save their world.