- Marv Wolfman
- Paul Ryan
- Bob McLeod
- Tom McCraw
- John Costanza
- Justice Alliance [Flash; Batman; Robin; Hawkman; Hawkgirl; Wonder Woman; Atom; Aquaman; Superman; Supergirl; Martian Manhunter; Green Arrow] (Earth-D, intro); Challenger of the Unknown [Red Ryan; Rocky Davis; Ace Morgan; Prof. Haley]; Anti-Monitor; Psycho-Pirate [Roger Hayden]; Lord Volt (Earth-6); Lady Quark (Earth-6); Pariah; Firestorm; Supergirl; Shining Knight; Dawnstar; Superman (Earth-1); Flash [Barry Allen]; Iris West Allen; Captain Cold (image); Mirror Master (Earth-D); Hoshi Rei; Hank Rei; Mollusk the Marauder; Medulla; Starfire [Koriand'r]; Green Lantern [John Stewart]; Cyborg; Nightwing [Dick Grayson]; Batman (Earth-1); Green Lantern [Tagin Sur] (Earth-D); Guardians of the Universe (Earth-D); Green Lantern [José Hernandez] (Earth-D); Red Tornado; Colossal Boy; The Mist; Plastic Man; Star Sapphire; Mon-El; Atom [Al Pratt]; Alexander Luthor Jr.; Batman (Earth-1); Clayface [Matt Hagen]; Hawkman [Katar Hol]; Ragman; Hawkwoman [Shayera Thal]; Flash [Jay Garrick]; Power Girl; Kid Flash [Wally West]; Jade; Sgt. Rock; Mercury; Obsidian; Dr. Fate; Spectre [Jim Corrigan]; Dr. Light [Kimiyo Hoshi]; Changeling [Gar Logan]; Hourman [Rex Tyler]; Blackhawk; Green Lantern [Alan Scott]; Dream Girl; Brainiac 5; Dolphin; Nuklon; Elongated Man; Wonder Woman (Earth-1); Wildcat [Ted Grant]; Robin (Earth-2); Phantom Stranger; Swamp Thing; Easy Company (Wildman and others); Solomon Grundy; Aquaman; Riddler; Black Lightning; Robotman [Cliff Steele]; Amazing-Man; Captain Comet; Deathstroke the Terminator; Sun Boy; Creeper; Kamandi; Platinum; Sea Devils (including Judy Watson); Bouncing Boy; Duo Damsel; Wonder Girl; Martian Manhunter [J'onn J'onzz]; Batgirl [Barbara Gordon]; Lead; Plasmus
- Heroes from Earth-1 try to help the Justice Alliance of Earth-D save its world.
- Fortress of Solitude (Earth-D); Kandor (Earth-D)
Takes place between Crisis on Infinite Earths #4 and #5 (or rather during issues #3-5).
First appearance of Earth-D and its Justice Alliance.