Justice League is based on the comic book and associated comic book characters published by DC Comics. After its second season, it became Justice League Unlimited, and ran an additional three seasons.
| # | Title | Airdate |
|---|---|---|
| 1 | Nov 18, 2001 | |
| 2 | Nov 18, 2001 | |
| 3 | Nov 18, 2001 | |
| 4 | Nov 20, 2001 | |
| 5 | Nov 27, 2001 | |
| 6 | Dec 4, 2001 | |
| 7 | Dec 11, 2001 | |
| 8 | Jan 22, 2002 | |
| 9 | Jan 29, 2002 | |
| 10 | Feb 24, 2002 | |
| 11 | Mar 4, 2002 | |
| 12 | Mar 11, 2002 | |
| 13 | Mar 18, 2002 | |
| 14 | Apr 8, 2002 | |
| 15 | Apr 15, 2002 | |
| 16 | Apr 22, 2002 | |
| 17 | Apr 29, 2002 | |
| 18 | Sep 7, 2002 | |
| 19 | Sep 14, 2002 | |
| 20 | Sep 21, 2002 | |
| 21 | Sep 28, 2002 | |
| 22 | Oct 5, 2002 | |
| 23 | Oct 12, 2002 | |
| 24 | Nov 10, 2002 | |
| 25 | Nov 10, 2002 | |
| 26 | Nov 10, 2002 |
| # | Title | Airdate |
|---|---|---|
| 1 | Jul 6, 2003 | |
| 2 | Jul 6, 2003 | |
| 3 | Oct 5, 2003 | |
| 4 | Oct 5, 2003 | |
| 5 | Oct 12, 2003 | |
| 6 | Oct 12, 2003 | |
| 7 | Oct 19, 2003 | |
| 8 | Oct 19, 2003 | |
| 9 | Oct 26, 2003 | |
| 10 | Oct 26, 2003 | |
| 11 | Nov 2, 2003 | |
| 12 | Nov 2, 2003 | |
| 13 | Nov 9, 2003 | |
| 14 | Nov 9, 2003 | |
| 15 | Nov 16, 2003 | |
| 16 | Nov 16, 2003 | |
| 17 | Nov 23, 2003 | |
| 18 | Nov 23, 2003 | |
| 19 | Nov 30, 2003 | |
| 20 | Nov 30, 2003 | |
| 21 | Dec 7, 2003 | |
| 22 | Dec 7, 2003 | |
| 23 | Dec 14, 2003 | |
| 24 | May 30, 2004 | |
| 25 | May 30, 2004 | |
| 26 | May 30, 2004 |