Three years after the events in season 2, Superman is a member of the Justice League of America, while Kal-El is working with the Legion. Though Brainiac 5 tries to struggle to redeem himself. And Superman's cousin, Kara Zor-El is seen fully trained by Superman to use her powers. The main focus of this season is Brainiac 5 trying to redeem himself after Dark Victory, and Brainiac 6 trying to destroy the Legion. This is based on the 12 issue comic series, Justice.


June 2008


November 2008


  • Legion of Super-Heroes:
    • Bouncing Boy (Michael Cornacchia)
    • Brainiac 5.1. (Adam Wylie) - has been living in a dark hole ever since the events of Dark Victory, he couldn't get enough sleep, he has grown a stubble, and his hair grew a little bit, he has become workaholic and refused to get back with the Legion
    • Chameleon Boy (Alexander Polinsky)
    • Lightning Lad (Andy Milder)
    • Phantom Girl (Heather Hogan)
    • Saturn Girl (Kari Wahlgren)
    • Timber Wolf (Shawn Harrison)
    • Triplicate Girl (Kari Wahlgren)
    • Kell-El/Superman X (George Newbern) - appears as a recurring character
    • Wildfire (Josh Keaton) - appears as a loose cannon
    • Supergirl (Coleen O'Shuganessy)
    • Blok (Kevin Michael Richardson)
    • Dawnstar (Cree Summer)
    • Shadow Lass (Lacey Chalbert)
    • Sensor (E.G. Daily)
    • Ferro Lad (Dave Wittenberg) - revealed to be Ferro Lad's twin brother
    • Magnetic Kid (Scott Menvile)
    • Tellus (Khary Payton)
    • Colossal Boy (Adam Wylie)
    • Cosmic Boy (Will Wheaton)
    • Dream Girl (Tara Platt) - appears as Star Boy's girlfriend
    • Element Lad (Dee Bradley Baker)
    • Karate Kid (Keith Ferguson)
    • Light Lass (Kari Wahlgren) - disguised as Lightning Lad after he sacrificed himself to save Saturn Girl from Brainiac, and was officially accepted into the Legion
    • Matter-Eater Lad (Alexander Polinsky)
    • Nemesis Kid (Keith Ferguson)
    • Shrinking Violet (Kari Wahlgren) - dates Matter-Eater Lad
    • Sun Boy (Wally Wingert)
    • Tyroc (Troy Baker)
    • Ultra Boy (James Arnold Taylor) - dating Phantom Girl
  • Justice League: - Clark's team after he left the Legion
    • Clark Kent/Superman (George Newbern)
    • Bruce Wayne/Batman (Kevin Conroy)
    • Diana Prince/Wonder Woman (Susan Eisenberg)
    • Katar Hol/Hawkman (Rick D. Wasserman)
    • Shayera Hal/Hawkgirl (Maria Canals-Barera)
    • Hal Jordan/Green Lantern (Nathan Fillion)
    • Barry Allen/Flash (Michael Rosenbaum)
    • Martian Manhunter (Carl Lumbly)
    • Arthur Curry/Aquaman (Christian Slater)
    • Oliver Queen/Green Arrow (Liem O'Brien)
    • Ray Palmer/Atom (Ioan Grufford)
    • Dinah Laurel Lance/Black Canary (Andrea Baker)
    • Billy Batson (Max Charles)/Captain Marvel (Tate Donovan)
    • Ralph Dibny/Elongated Man (Jim Ward)
    • Rex Mason/Metamorpho (Corey Burton)
    • Phantom Stranger (Colm Feore)
    • Eel O'Brien/Plastic Man (David Spade)
    • John Ulthoon/Red Tornado (Troy Baker)
    • Zatanna (Padget Brewster)
  • Doom Patrol:
    • Robotman (John Cena)
    • Negative Man (Jeff Bergman)
    • Elasti-Girl (Serena Irwin)
    • Beast Boy (Jeremy Shada)
  • Teen Titans:
    • Dick Grayson/Robin (Dominic Scott Key)
    • Roy Harper/Speedy (Zach Shada)
    • Garth/Aqualad (Jonah Bobo)
    • Wally West/Kid Flash (Logan Grove)
    • Donna Troy/Wonder Girl (Ariel Winter)
  • Barbara Gordon/Batgirl (Tara Strong) - Kara's best friend in the present day
  • Marvel Family:
    • Mary Marvel (Andrea Baker)
    • Freddy Freeman/Captain Marvel, Jr. (Jeremy Shada)
  • Metal Men:
    • Gold (Andy Milder)
    • Platinum (Christie Carlson Romano)
    • Lead (Ogie Banks)
    • Iron (Chris Cox)
    • Mercury (Rene Auberjoinis)
    • Tin (Felix Alvita)


  • Brainiac 6.0. (Corey Burton) - the main antagonist, works with Brainiac 1.0. from the past, as he asks him to help Luthor plan the formation of the Legion of Doom for an unknown purpose, which is revealed to be destroying the legacy of Superman.
  • Legion of Doom:
    • Lex Luthor (Clancy Brown)
    • Brainiac 1.0. (Corey Burton) - acts as Luthor's 2nd-in-command
    • Giganta (Jennifer Hale)
    • Gorilla Grodd (Powers Boothe)
    • Sinestro (Corey Burton)
    • Cheetah (Cree Summer)
    • Solomon Grundy (Fred Tatasciore)
    • Riddler (Charlie Adler)
    • Scarecrow (Charlie Adler)
    • Toyman (Tom Kenny)
    • Black Manta (Jonathan Adams)
    • Bizarro (George Newbern)
    • Captain Cold (Diedrich Bader)
    • Parasite (Adam Baldwin)
    • Poison Ivy (Virginia Madson)
    • Black Adam (Keith Szrabajka)
    • Metallo (David Sobolov)
    • Clayface (Kevin Michael Richardson)
  • Joker (Mark Hamill)
  • Two-Face (John DiMaggio)
  • Dr. Sivana (Dee Bradley Baker)


Episode_Number Title_for_the_Episodes Air_Date Plot
27 "Legion" 3 years after defeating Brainiac, Saturn Girl, Phantom Girl and Triplicate Girl recruit Supergirl, who never had female friends before, Lightning Lad talking about dating Saturn Girl, Timber Wolf, jealous of Phantom Girl's romantic relationship with Ultra Boy and Bouncing Boy talks about his few many dates with Triplicate Girl. But Kara meets Brainiac 5.1., but sees his forehead has the same symbols of Brainiac 1.0., and believes him to be the cause of Krypton's destruction and her parents dying there when she was a baby.
Legionnaires: Bouncing Boy, Brainiac 5.1., Cosmic Boy, Kell-El, Lightning Lad, Phantom Girl, Saturn Girl, Supergirl, Timber Wolf, Triplicate Girl and Ultra Boy
28 "Enter The Dessert!" Timberwolf, and Supergirl gets stranded on the new Gobi, and are hunted down by Sandmurks!
29 "Legends Of Luthor" Lex Luthor finds Superman and the Legion of Superheroes headquarters and filled it with Kryptonite.
30 "Conquered By Sand" A gorgeous woman named "Sand" has brought them into her castle, but Saturn Girl, and Triple-girl has suspicions.
31 "Maid Of Might" The Legion learns about how Kara Zor-El landed in the 31st century.

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