When Aquaman, ruler of Atlantis, decides he has had enough of the surface-dwellers trespassing in his ocean, the Justice League tries to smooth things over. Aquaman takes Superman's advice and arrives in New York City to speak to the World Assembly, but it soon becomes apparent that he may have been right about the surface-dwellers all along.

The episode was rated 7.75 from 293 votes.

Exposed as a criminal, sentenced to prison, and terminally ill due to long term kryptonite exposure, Lex Luthor escapes and assembles a supervillain team consisting of Cheetah, The Shade, Solomon Grundy, Star Sapphire, Copperhead, and Ultra-Humanite to take on the Justice League, calling themselves the Injustice Gang. The Joker also becomes part of the team, but on his own choice. However, this gang proves short-lived as its major weakness proves no match for Batman's wiles.

The episode was rated 7.76 from 284 votes.

Morgaine and Mordred get the Stone and plan to transform England and restore it to its medieval glory.

The episode was rated 7.77 from 163 votes.

Believing that Green Lantern is receiving an unfair trial, the Leaguers investigate, while GL's superiors, the Guardians of the Universe, enter as witnesses. But the whole trial may be a ruse.

The episode was rated 7.77 from 332 votes.

Fight promoter and new contestant Mongul instructs Superman to throw the fight against him, or he'll destroy the enslaved Draaga's home planet.

The episode was rated 7.78 from 202 votes.

The League aid the Justice Guild against their arch-nemeses while trying to unravel the secrets of the Guild's world.

The episode was rated 7.80 from 181 votes.

The heroes race to rescue two of their own before the Imperium gets to Earth and completes its conquest.

The episode was rated 7.82 from 433 votes.

Superman and Batman team up against alien invaders, but soon find they need to call in help.

The episode was rated 7.82 from 684 votes.

Green Lantern, Wonder Woman, Flash, and Hawkgirl team up with Superman, Batman, and J'onn J'onzz to defeat the alien invaders, but one of them falls in battle and the rest are captured.

The episode was rated 7.87 from 497 votes.

Exposed as a criminal, sentenced to prison, and terminally ill due to long term kryptonite exposure, Lex Luthor escapes and assembles a supervillain team consisting of Cheetah, The Shade, Solomon Grundy, Star Sapphire, Copperhead, and Ultra-Humanite to take on the Justice League, calling themselves the Injustice Gang. The Joker also becomes part of the team, but on his own choice. However, this gang proves short-lived as its major weakness proves no match for Batman's wiles.

The episode was rated 7.87 from 253 votes.

When the present is altered, the Justice League must travel back in time to World War II to restore history.

The episode was rated 7.90 from 196 votes.

Betrayed by his own subjects, Aquaman and the League fight to save Atlantis, the world, and Aquaman's own son against his half-brother Orm's coup.

The episode was rated 7.92 from 270 votes.

An explosion throws four Leaguers into an alternate dimension where they meet their childhood comic book heroes...the Justice Guild!

The episode was rated 7.93 from 187 votes.

A separate League struggle against the Nazis and determine who is responsible for the Axis' technological advances.

The episode was rated 7.98 from 170 votes.

Wonder Woman and Steve Trevor survive the attack and trick the Germans into believing that the communicator was destroyed. GL and Easy Co. find the runaway and discover that Vandal Savage plans to use jet aircraft to invade America. GL boards and tries to stop Vandal's plane while Hawkgirl, Superman, and Flash try to intercept the flight with J'onn's help. With the aid of the Blackhawks and Flash notifying the U.S. Navy, the German flight is shot down and Vandal apparently is killed. The JLA return to the present to find everything restored and Wonder Woman visits a now elderly Steve Trevor in the restored present.

The episode was rated 8.02 from 165 votes.