Meltman loses his memory after a life-size phone lands on him during a mission to steal a secret formula from The Mayor’s office. The Action League—with help from Bill the Lab Guy—must try their best to bring him back to his previous state.

There’s a new superheroine in town, and her name is Lightning Lady! She wastes no time in getting herself inducted into the Action League and garnering much (male) attention, leaving Thundergirl jealous. Is everything about Lightning Lady crystal clear, or is there more to this mysterious "woman" than once thought?

Loud clog-dancing by Meltman (in midst of a celebration to honor the Action League) goes wrong when it wakes up Spotzilla, a Mesozoic creature that runs rampant upon awakening. After it eats up Stinky Diver during a televised interview, the League realize that they must act fast to rescue one of their own.

The Mayor’s son gets stuck in a kitchen sink during an exploration, and it’s up to the Action League to save him. However, the League's ineptitude at such tasks proves to be an obstacle, with Thundergirl and Stinky Diver spending much of the episode stuck to an active ceiling fan. Can they rescue the victim before time runs out?

A mysterious liquid is squirted onto Thundergirl by The Mayor in a sabotage attempt, resulting in her losing the ability to fly. Once the Action League find out that he has two children kidnapped in a birdhouse, only the power of flight can save them, so the League gets to work—using balloons and a slingshot, among other devices, to try to get Thundergirl airborne.

The Mayor kidnaps The Flesh and unleashes his newest weapon, RoboFlesh: a robot designed to look exactly like his namesake, except for bolts sticking out of his entire body. RoboFlesh goes into attack mode on the Action League, who are having a parade, until the actual Flesh comes to the rescue. The only downside is that the League can’t differentiate between the two!

After a failed attempt at saving a victim from a flushing toilet, Stinky Diver goes on a downward spiral. The Action League must work together to bring back to courage he once had. In the end, Stinky will have to overcome his fear of long-distance diving, but only in order to retrieve his wallet, which is in the hands of a drowning Meltman. (First appearance of Stench Diver.)

Upon the death of Helena XXII, Queen of the Pigeons, the Action League are given the task of keeping the four eggs she's left behind safe until they hatch. After accidentally breaking one of them, The Chief makes the League responsible for a 24-hour surveillance of the remaining batch. Will there be any offspring left by the end of the episode?