Steve Rogers volunteered for the super soldier serum and became Captain America - the first Avenger!

Phineas is always thinking up ways to squeeze more fun out of every summer day to stay entertained.

All the Hulk wants is to be left alone. But ever since the accident that transformed Bruce Banner into the incredible Hulk, the military has hunted him. To them, the Hulk is dangerous, the Hulk is a living weapon that has to be contained. And all this makes the Hulk ANGRY. The Hulk has been forced into a life of violence, of non-stop running and fighting.

Ferb is the brains behind Phineas' gadgets and contraptions.