As of July 2026, Justice League Unlimited Season 1 aired in 2004 with 13 episodes — streaming now on HBO Max Amazon Channel. Full episode guide and where to watch below.
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Justice League Unlimited Season 1

2004 13 Episodes Animation · Action & Adventure ⭐ 8/10

Justice League Unlimited Season 1 has built a real following on and among viewers who want their sci-fi to think as hard as it looks. A compact run that never overstays its welcome. An 8/10 rating says what the writing already makes obvious: this one works. Kevin Conroy leads a cast that never lets the concept overwhelm the characters. Put it on tonight and see for yourself.

Justice League Unlimited Season 1 is not trying to be everything to everyone, and that focus is exactly what makes it work. Justice League Unlimited Season 1 treats its concept seriously enough to follow it all the way through. Season 1 of Justice League Unlimited includes 13 episodes. It aired from July 2004 to January 2005. This season stars Kevin Conroy, George Newbern and Susan Eisenberg. Kevin Conroy and George Newbern lead a cast that brings real weight to the material. It was aired in 2004. The rules of Justice League Unlimited Season 1's world are consistent enough that the big swings never feel like cheating. The hit rate here is high enough that skipping ahead never feels like an option.

Sci-fi fans who want ideas alongside the spectacle will find Justice League Unlimited Season 1 genuinely rewarding. It rewards viewers regardless of what else is in their watch history. The complete run is available and best experienced without too much prior knowledge of where it goes. Watch for Kevin Conroy in particular — the performance elevates the material. Satisfying on multiple levels.

📡 Where to Watch Justice League Unlimited Season 1

🇺🇸 United States
🇨🇦 Canada
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🎬 Justice League Unlimited Season 1 — Episode Guide

E1
Initiation
2004-07-31
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.
E2
For the Man Who Has Everything
2004-08-07
Batman and Wonder Woman find Superman immobilized in the Fortress of Solitude by a plant sent by the would-be conqueror Mongul.
E3
Kid Stuff
2004-08-14
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.
E4
Hawk and Dove
2004-08-21
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.
E5
This Little Piggy
2004-08-28
When Circe changes Wonder Woman into a pig, Batman and Zatanna must find her and change her back.
E6
Fearful Symmetry
2004-09-04
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.
E7
The Greatest Story Never Told
2004-09-11
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".
E8
The Return
2004-09-18
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.
E9
Ultimatum
2004-12-04
A team of too-good-to-be-true superheroes find out the truth about their origins and go on the rampage.
E10
Dark Heart
2004-12-11
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.
E11
Wake the Dead
2004-12-18
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.
E12
The Once and Future Thing (1): Weird Western Tales
2005-01-01
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.
E13
The Once and Future Thing (2): Time, Warped
2005-01-29
The time traveling League team goes to the future to team up with that time's League to battle Chronos who rules.

🎭 Cast of Justice League Unlimited Season 1

Kevin Conroy
Kevin Conroy
Batman (voice)
George Newbern
George Newbern
Superman (voice)
Susan Eisenberg
Susan Eisenberg
Wonder Woman (voice)
Carl Lumbly
Carl Lumbly
J'onn J'onzz (voice)
Phil LaMarr
Phil LaMarr
Green Lantern (voice)

📋 All Seasons of Justice League Unlimited

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