Holly is a young, courageous hedgehog, but woefully sheltered by her overprotective Dad. Walter is an overworked, exhausted rabbit with a few dozen kids of his own, who just wants a change in his predictable routine. When this unlikely duo crashes into each other’s lives, things take a drastic turn. After a bump to the head Walter now believes that he is Sir Balderdash the Great – a hero, a warrior, a legend. While Holly, who is just thrilled to be out of the house, gets swept up in Walter's concussion fuelled fantasy.

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.

American animated television series

American animated comedy-musical television series

When Dr. Doofenshmirtz's latest invention causes the Marvel heroes to lose their powers, they team up with Phineas and Ferb to save the world from Doofenshmirtz and the Marvel villains.