Justice League Unlimited (JLU) is an American superhero animated television series that was produced by Warner Bros.

Notably, it is the most continuity-heavy show of the DC Animated Universe, and weaves together characters and plot lines from past series.

The general format of each episode is to have a small team assemble to deal with a particular situation, with a focus on both action and character interaction.

This plot line builds upon events that occurred during the second season of Justice League (which in turn built upon events in Batman: The Animated Series, Superman: The Animated Series, Batman Beyond, Static Shock, and The Zeta Project), and would go on to affect the plotlines of most of its episodes.

Towards the end of the series, certain characters became off-limits to the show, particularly characters associated with Batman, were restricted due to the unrelated animated series The Batman and Christopher Nolan's live-action The Dark Knight Trilogy, to avoid continuity confusion, thus leading to the popular term known as “Bat-embargo".

Stan Berkowitz, a member of the production team, left the show later for the TV series Friends and Heroes, and writer Matt Wayne was contracted to replace him.

According to Matt Wayne, if the show had been renewed for a fourth season, he would have liked to write more episodes focusing on Superman and Wonder Woman.

Justice League Unlimited received critical acclaim and is listed as one of the best animated television shows of all time.

Warner Home Video also released another DVD set titled Justice League: The Complete Series.