Action Man: A.T.O.M.

After competing in and completing the reality show, Trackdown, the five contestants, Axel, Hawk, King, Lioness and Shark are offered jobs to test new and experimental vehicles for Mr Lee, Trackdown’s creator and president and founder of Lee Industries, a multi-billion dollar company. The five accept his offer, but when a dangerous criminal mastermind named Paine escapes from prison, Axel has personal interest into helping recapture him.

Lee, who is acting clingy and parental around the team, equips them with new gear and weaponry to test. At the same time Paine and his henchman Spydah seek to destroy the Landmark City dam. Axel also tells Lioness about his past with Paine.

The Alpha Teens move out of Lee’s R & D physicality and into an abandoned Aquatic Center. Meanwhile, due to a freak accident caused by Axel previously, Paine gains new powers that emit terrible pain through his body which he can transfer to those he touch. With these powers, Spydah and added help from the acrobatic Cannonball Bros., Paine goes to Lee Industries, seeking revenge on Axel Manning.

Paine learns of Nutronium, a chemical that can put an end to his constant pain. He and Spydah seek to steal it with the help of Albert, a dangerous muscle-laden criminal who uses a barbell for a weapon. In the heat of battle with the Alpha Teens, Paine unintentionally mutates Albert into the super-strong giant, Flesh.

The Alpha Teens, Lee and the building security board head of Landmark City become trapped in the yet to be opened Lee Plaza. The culprit, Silas Greene the building’s deranged architect, seeks revenge against Lee using the building’s security robots and other lethal functions to dispose of him.

The Alpha Teens accompany Hawk, who stars in the movie being filmed, "Radioactive Island", to an island that served as a military testing site. While King’s animalistic nature steals Hawk’s thunder, it also gets the attention of Recombo, a mad scientist who combines different species of animals into one.

When Shark skips out on a fancy party held by Lee on his yacht, he is captured by the villain, Eel. With various sea creatures under his mind-control, Eel sends his "pet" giant squid to sink Lee’s yacht.

At Christmas time, while the other Alpha Teen members are packing to visit their families, a lonely Axel thinks of his late father. He is attacked by Dragon, a ninja mercenary, who like Axel, is skilled in the Jo-Lan martial art.

Bogey, a rival of Hawk’s, gets under Hawk’s skin at an airshow. Later, Hawk and the other Alpha Teens are trained to fly Mr. Lee’s Hypersonic Stratojet, an aircraft Paine has every intention on stealing.

On their way to the frosty Iron Mountain, the Alpha Teens are greeted by Dr. Magness, a doctor at a ski resort. After a wired rash of incidents involving the team’s vehicles, including a car crash that injured Lioness’s leg, she suspects that there is more to Dr. Magness than her teammates realize.