It debuted on September 23, 2006, and centers on a young Superman's adventures in the 31st century, fighting alongside the eponymous group of superheroes.

The show was produced by one of its main character designers James Tucker, a co-producer of the Justice League Unlimited series, for the Kids' WB line-up on The CW network.

It would have taken place three years after the end of the second season, introducing Sensor, Magnetic Kid, Supergirl, Tellus, Princess Projectra, and Shadow Lass while expanding the roles of background characters Blok, Wildfire, and Dawnstar.

After traveling to the future, young Clark assumes the identity of Superman and gradually learns to control his abilities, becoming the hero he is destined to be.

Series producer James Tucker offered descriptions of the core team in a July 2006 interview at San Diego Comic-Con.

Ayla Ranzz, the sister of Lightning Lad, also appears, but lacks powers and is not a superhero like her comic counterpart.

Part 1: The Legion is called to stop the Sun-Eater, a powerful gaseous creature capable of destroying stars, after the alien Controller frees it from the Fenton Arms Depot.

They try to stop it from devouring a red sun in the uninhabited Cheyenne Delta and empowering itself, but fail to do so, with Ferro Lad blaming himself for missing a crucial energy blast.

During a battle with the Legion, Imperiex steals Kell's warp key and travels to the 31st century, altering the timeline and creating an antimatter wave that kills Triplicate Girl's white self and threatens to destroy the future.

Season 1 volume 1 has a bonus featurette called "We Are Legion", and the series finale has an audio commentary with producer James Tucker, director Brandon Vietti, and the voice of Saturn Girl, Kari Wahlgren.

[40][41] The series is also available for purchase or streaming on various platforms, including iTunes, Amazon Prime Video, and formerly DC Universe.

An interview concerning the comic confirmed that it would continue publication despite the series ending, and would also be telling stories that were to have taken place after the second-season finale.

A tie-in promotion with McDonald's Happy Meal took place in August 2007, containing eight figurines: Superman, Timber Wolf, Lightning Lad, Brainiac 5, Bouncing Boy, Mano, Tharok, and Validus.

[45] The collectible miniatures game HeroClix produced a special starter set of the Legion, including a figure of Superman from the first season.