The series originally premiered as a four-part mini-series on September 20, 2010, on Nicktoons; further episodes followed as the theme continued as a toy line until its discontinuation in 2014.

Hero Factory's headquarters are based in a towering skyscraper centred in the fictional Makuhero City on an asteroid-like planet.

Led by veteran Hero Preston Stormer, the team comprises senior members Dunkan Bulk and Jimi Stringer, original rookies and later fully fledged teammates William Furno, Mark Surge and Natalie Breez, and new rookies Julius Nex, Nathan Evo and Daniel Rocka.

The forms became the basis for subsequent upgrades; Heroes would be provided with new armor, weapons and gadgets for the mission at hand based on the environment they would have to enter or the lethalness of a villain.

He later learns that his body has been corrupted by nanobots from the sludge and, after a fight with Stringer, Bulk and Furno, escapes the Hero Factory.

Breez manages to save the workers by transporting them via Drop Ship while Fire Lord is distracted by Stormer and Furno.

Discovering that their weapons have little effect on the villains, Stormer orders the team to retreat, but they are blocked off from the Hero Craft by them.

Rookie Hero Daniel Rocka, who was born with the upgrade, is sent to find civilian Aldous Witch, who has crash-landed on the planet Quatros.

Witch abuses the beast and controls his mind with his Skull Staff and the corrupted Quaza spike implanted onto the Raw-Jaw's back.

Rocka, who has since received a modification giving him larger, more resilient armor and a stronger double-claw combo tool, approaches Witch.

An unprecedented jailbreak occurs in the Hero Factory, releasing every known captive villain into the galaxy who begin spreading chaos and destruction everywhere.

For the mission named "Catch 'Em and Cuff 'Em", the Alpha 1 Team are upgraded with new armor and weapons based on the environment of the villains' known locations.

As Stormer, Furno, Evo, Nex, Surge, Breez, Bulk and Stringer are sent to catch and cuff the villains, Rocka remains at the Hero Factory for "security reasons".

With order restored in Hero Factory, Zib informs Alpha 1 and Mr. Makuro that Black Phantom sent the building's structural plans to an unknown source.

NOTE 1: Although, Breez, Bulk, Nex, and their assigned villains, Thornraxx, Core Hunter, and XT4, did not appear in the Breakout episodes for an unknown reason, possibly due to budget issues, they got involved in the mission.

Brains, launched by the unknown villain who got the Hero Factory structural plans in the previous episode, are sent to Makuhero City's planet, where they infect and possess the numerous native creatures.

The Heroes, in the midst of a publicity event celebrating their ongoing accomplishments for "Mission: Catch 'Em and Cuff 'Em", are sent to the Factory to receive upgrades to battle the creatures.

Rocka takes on an enormous dragon using a jetpack, while Surge gets possessed by a brain and uses the Assembly Tower to create an army of soulless 'blank Hero' drones.

In the clean-up of the battle, more brains are discovered to be lurking underneath the Factory in the tunnels created by Dragon Bolt's infiltration.

In the city of Antropolis, a drill for a new underground Metro Line project reveals strange creatures called Jumpers from within the planet that abduct the crew.

The first four TV episodes aired continuously over four nights in September 2010, and were later released onto DVD as a singular film titled Hero Factory: Rise of the Rookies on November 16.

All three were released onto DVD on October 4 the same year, as Hero Factory: Savage Planet, with "Ordeal of Fire" added as a bonus feature.

The tenth episode "Brain Attack" premiered on the official Hero Factory website in March 2013, receiving a TV broadcast the following month on Nicktoons.

[2] A further episode titled "Invasion from Below" was produced by Lego with design partner Advance and animation company Ghost.