!! season 3

Stinky Diver arrives at the Action Headquarters to discover that all of his property has been messed with, the perpetrator behind these actions turning out to be someone known as the Red Ninja (much thanks to a ninja star that finds its way into Meltman's back). The Red Ninja, a rival of Stinky's from years ago, has come back for revenge, and the only way Stinky can defeat him once more is by visiting his old sensei, Master Pu, to gather forgotten tips.

An opal stolen by The Mayor from a mummy's tomb causes a curse to be unleashed, resurrecting the ancient mummy. It runs rampant around town—even managing to out-strength the Action League—in search for his stolen treasure, which The Mayor happens to be selling on the Home Shopping Network. Will the League manage to return the mummy's opal to its rightful place and reverse the curse?

An arrested gypsy places a curse on The Chief upon being labeled as a fake at a carnival. Soon after, he begins an odd and unhealthy eating habit, chewing down just about everything around him, and his weight begins increasing at an alarming rate. The gypsy is asked to reverse the curse, but is accidentally crushed to death moments later. Will overeating mark the end of The Chief?

Upon confronting The Mayor in the midst of his latest treachery, The Flesh causes both he and The Chief to take part in a blender accident. Once Bill the Lab Guy gets done with the operation, everything seems to be back to normal—except the fact that The Chief and Mayor's faces have been switched! Being the dullards that they are, the Action League begin taking orders from The Mayor, while The Chief is imprisoned. Could things get any worse?!

Stinky Diver, depressed over the fact that his own mother tried ratting him out for a sum of money during the Gulf War, makes friends with an estranged dog, whom he names Smelly. Stinky and Smelly become the best of friends, but the hound makes a habit of injuring the rest of the Action League. Is Smelly just a playful pooch, or is there more to this issue than originally thought?

Confusing a rare and deadly South American jumping spider egg with a ping pong ball, Meltman witnesses the spider's hatching, and decides to act as a maternal figure for the arachnid. The spider begins to cause harm to the Action League, but Meltman is not ready to give up the fight against keeping it so easily. In the end, it's up to the spider's mother to confront Meltman and get her offspring back.

Meltman finds himself a girlfriend, Andrea, who quickly begins to become a nuisance to the rest of the Action League due to her pushing ways and being allowed into secret territory by Meltman. After noticing how badly Meltman is treated by the League, she motivates Meltman into becoming a solo superhero known as Dr. Melt. Is Meltman's girlfriend trying to drive him away from the people who care about him the most, or is she just a pure soul trying to do good?

Bill the Lab Guy invents a cloning device (a.k.a. copyer) and warns the Action League to never use it. As they step onto the device and look at their reflection, The Mayor gets involved, pressing the cloning machine's lid down. As The Mayor steals and tries getting away with some incredibly breakable fine China, the League (and two clones of each member) must try making amends with their respective counterparts long enough to stop him

The Action League are assigned to protect a very important painting during a night shift. However, they get distracted while making fun of a drawing by Thundergirl, and The Mayor steals the painting, taking it to his lair. Can the League retrieve this original Timmy painting before The Mayor destroys it with a paper shredder?

The Mayor is not being allowed into the National Football League as a quarterback, being told that there are already too many. So he begins to get rid of the NFL's most valuable quarterbacks, one by one, as the Action League are assigned to protect them—much to the misfortune of the players. Will the entire QB section be destroyed just so The Mayor can get in the game?

Hodge Podge is back with a plan: this time, he has formed his own radio station to play a song designed to play mind games with its listeners, causing them to form a hatred for and a desire to destroy the Action League. Everywhere they go, the League gets attacked by the dozen, and only an old friend of Bill the Lab Guy's can save them!

The Mayor, disguised as a movie director, offers Thundergirl the lead role in his upcoming project. However, every scene involving her ends with an injury in one way or another. Meltman soon finds out the director's true identity, but the rest of the Action League are too busy with their yet-to-come fame to care. Will the final scene—involving a massive safe landing on top of Thundergirl—be the final blow for her?