Justice League

Justice League (TV series)

Justice League is an American animated television series about a team of superheroes which ran from 2001 to 2004 on Cartoon Network. The show was produced by Warner Bros. Animation. It is based on the Justice League of America and associated comic book characters published by DC Comics...

and Justice League Unlimited

Justice League Unlimited

Justice League Unlimited is an American animated television series that was produced by Warner Bros. Animation and aired on Cartoon Network. Featuring a wide array of superheroes from the DC Comics universe, and specifically based on the Justice League superhero team, it is a direct sequel to the...

are American

United States

The United States of America is a federal constitutional republic comprising fifty states and a federal district...

 animated series about a team of superhero

Superhero

A superhero is a type of stock character, possessing "extraordinary or superhuman powers", dedicated to protecting the public. Since the debut of the prototypical superhero Superman in 1938, stories of superheroes — ranging from brief episodic adventures to continuing years-long sagas —...

es which ran from 2001

2001 in television

The year 2001 in television involved some significant events.Below is a list of television-related events in 2001.-Events:-Debuts:-1940s:*Meet the Press .*Candid Camera .*CBS Evening News ....

 to 2006

2006 in television

2006 in television may refer to:*2006 in American television*2006 in Australian television*2006 in British television*2006 in Canadian television*2006 in Japanese television...

 on Cartoon Network

Cartoon Network

Cartoon Network is a name of television channels worldwide created by Turner Broadcasting which used to primarily show animated programming. The channel began broadcasting on October 1, 1992 in the United States....

. Since April 2006 it is being shown on Cartoon Network's sister channel, Boomerang

Boomerang (TV channel)

Boomerang is a 24-hour American cable television channel owned by Turner Broadcasting System, a division of Time Warner. Boomerang specializes in reruns of animated programming from Time Warner's extensive archives, including pre-1986 MGM, Hanna-Barbera, Cartoon Network, DePatie-Freleng Enterprises...

 and it is also shown on Teletoon every Friday night for Superfan Fridays. It is based on the Justice League

Justice League

The Justice League, also called the Justice League of America or JLA, is a fictional superhero team that appears in comic books published by DC Comics....

 and associated comic book

Comic book

A comic book or comicbook is a magazine made up of comics, narrative artwork in the form of separate panels that represent individual scenes, often accompanied by dialog as well as including...

 characters published by DC Comics

DC Comics

DC Comics, Inc. is one of the largest and most successful companies operating in the market for American comic books and related media. It is the publishing unit of DC Entertainment a company of Warner Bros. Entertainment, which itself is owned by Time Warner...

.

After the second season, the show was renamed Justice League Unlimited, had a vastly expanded cast of characters, and largely changed from two part episodes, to single episode stand-alone stories that often intertwined to form long (even season-long) story arcs.

Justice League and Justice League Unlimited were considered by their creators to be one series (albeit renamed), so Season "1" of Justice League unlimited is in fact Season "3" of the overall series, simply renamed, and with a new theme song and opening and closing credits.