Palmer Atom-Smasher / Albert Rothstein Aztek / Uno B'wana Beast / Mike Maxwell Black Canary / Dinah Laurel Lance Blue Devil / Daniel Cassidy Booster Gold / Michael Jon Carter Captain Atom / Nathaniel Adams Captain Marvel / Billy Batson Commander Steel Crimson Avenger / Lee Travis Doctor Fate / Kent Nelson Doctor Light / Kimiyo Hoshi Dove / Don Hall The Elongated Man / Ralph Dibny Etrigan / Jason Blood Fire / Beatriz da Costa Huntress / Helena Bertinelli Green Arrow / Oliver Queen Hawk /Hank Hall Mister Terrific / Michael Holt Orion Red Tornado The Shining Knight / Sir Justin Speedy / Roy Harper Stargirl / Courtney Whitmore Steel / John Henry Irons S.T.R.I.P.E. / Pat Dugan Supergirl / Kara Kent / Kara Zor-L The Question / Vic Sage Vigilante / Greg Saunders Vixen / Mari McCabe Wildcat / Ted Grant Zatanna / Zatanna Zatara Unvoiced League members The Creeper / Jack Ryder Crimson Fox Doctor Mid-Nite Gypsy Hourman Ice Johnny Thunder and Thunderbolt Metamorpho / Rex Mason Nemesis Obsidian The Ray Rocket Red Sand Starman Vibe Waverider Additional protagonists A.M.A.Z.O. Andrea Beaumont / The Phantasm Aquagirl / Marina Bat Lash Batman / Terry McGinnis Chuck Sirianni Deadman El Diablo Green Lantern / Hal Jordan Green Lantern / Kyle Rayner Green Lantern / Kai-Ro Guardians of the Universe Hawkman / Carter Hall Jennifer Morgan Jonah Hex King Faraday Legion of Super-Heroes Bouncing Boy Brainiac 5 Phantom Girl Machiste Micron New Gods Big Barda Metron Mister Miracle / Scott Free Oberon Pow Wow Smith Shakira Spy Smasher Static / Virgil Hawkins The Warlord / Travis Morgan Warhawk / Rex Stewart Antagonists The antagonists for this series break down into three types based on season and story arc. The first season had a set of episodes linked by an arc focusing on a secret government agency trying to control the Justice League. The second season had a set linked by an arc focusing on an expanded Secret Society. Both seasons also had episodes that did not tie to the arcs. The general antagonists are listed first. Ares Atomic Skull Bizarro Blockbuster Captain Boomerang Captain Cold Cheetah Chronos Circe Copperhead Deimos The Demons Three Dreamslayer The Fatal Five Emerald Empress Mano The Persuader Tharok Validus (unvoiced) Felix Faust Gentleman Ghost Giganta Gorgon Hades Hath-Set Jokerz Bonk Chucko Dee Dee Ghoul Woof Lex Luthor Lord Havok Mercy Graves Mirror Master Mongul Mordred