第 1 季 共 13 集
播出时间：2004年8月1日
第 1 集 Initiation
播出时间：2004年8月1日
After unsuccessfully attempting to recruit the Green Arrow to join the expanded League, he plays an important role with a team sent to manage a crisis in Asia.
第 2 集 For the Man Who Has Everything
播出时间：2004年8月8日
Batman and Wonder Woman find Superman immobilized in the Fortress of Solitude by a plant sent by the would-be conqueror Mongul.
第 3 集 Kid Stuff
播出时间：2004年8月15日
Morgaine Le Fey transforms Superman, Batman, Wonder Woman, and Green Lantern into children after Mordred uses his magic to remove all adults from Earth and keep children on the Earth.
第 4 集 Hawk and Dove
播出时间：2004年8月22日
Ares creates a war machine called the Annihilator to escalate a civil war in Kasnia. Hawk, Dove, and Wonder Woman try to stop his plans.
第 5 集 This Little Piggy
播出时间：2004年8月29日
When Circe changes Wonder Woman into a pig, Batman and Zatanna must find her and change her back.
第 6 集 Fearful Symmetry
播出时间：2004年9月5日
Supergirl, Green Arrow, and The Question investigate Supergirl's disturbing dreams. They discover that Cadmus created a clone of Supergirl named Galatea while she was recovering from her fight against Superman on Earth.
第 7 集 The Greatest Story Never Told
播出时间：2004年9月12日
The Justice League battle Mordru in the background, while the narrative follows Booster Gold as he attempts to close a walking black hole while he's supposed to be on "crowd control".
第 8 集 The Return
播出时间：2004年9月19日
After blasting through the entire Green Lantern Corps, the android Amazo returns to Earth. Only the Justice League stands between him and his goal -- the now-reformed Lex Luthor.
第 9 集 Ultimatum
播出时间：2004年12月5日
A team of too-good-to-be-true superheroes find out the truth about their origins and go on the rampage.
第 10 集 Dark Heart
播出时间：2004年12月12日
Most of the League battles with powerful alien nanotechnology but, realize that the waves of self-replicating robots cannot be simply destroyed. The diminutive Atom shrinks himself to stop the robots from the inside.
第 11 集 Wake the Dead
播出时间：2004年12月19日
A trio of high school kids accidentally resurrect Solomon Grundy, reviving him more powerful than ever but with no memories of his past. Dr. Fate, Amazo, Aquaman, and Shayera assist League regulars stopping his rampage.
第 12 集 The Once and Future Thing (1): Weird Western Tales
播出时间：2005年1月2日
While pursuing a time traveling thief, Batman, Wonder Woman and Green Lantern team up with a collection of DC Universe western heroes to battle the villain controlling him.
第 13 集 The Once and Future Thing (2): Time, Warped
播出时间：2005年1月30日
The time traveling League team goes to the future to team up with that time's League to battle Chronos who rules.
