- Script
- Kurt Busiek (credited)
- Pencils
- Alan Kupperberg (credited)
- Inks
- Rich Buckler (sourced)
- Colors
- Gene D'Angelo (credited)
- Letters
- Ben Oda (credited)
- Genre
- superhero
- Characters
- Justice League of America [Superman (Earth-1); Wonder Woman (Earth-1); Flash [Barry Allen]; Aquaman (cameo); Zatanna (cameo); Green Arrow (Earth-1) (cameo); Elongated Man (cameo); Black Canary (cameo); Hawkman [Katar Hol] (cameo); Hawkwoman [Shayera Thal] (cameo); Firestorm (cameo); Red Tornado (cameo); Green Lantern [Hal Jordan] (cameo); Phantom Stranger (cameo); Ray Palmer [Atom] (cameo)]; Justice Society of America [Starman [Ted Knight]; Dr. Fate; Dr. Mid-Nite; Green Lantern [Alan Scott]; Flash [Jay Garrick] (flashback)]; Supergirl (guest star); Joshua Champion (villain); Ian Champion; Vicky Champion; Meredith Champion; Batman (Earth-1) (flashback); Blackhawks [Blackhawk; Chop-Chop] (flashback); Adolf Hitler (flashback); Lucille Ball (flashback); Desi Arnaz (flashback); Mickey Mantle (flashback)
- Synopsis
- Three members of the League, with Supergirl, are transported to Earth-2 by two children with strange powers, where they meet four Justice Society members and face a menace who may be the children's father.
- Reprints
This story takes place at the same time as the Martian Invasion story in issues #228-230.
- Script
- Alan Gold (credited as Alan)
- Pencils
- Dick Dillin (logo illustration)
- Inks
- ? (logo illustration)
- Colors
- ? (logo illustration)
- Letters
- typeset
- Job Number
- L-1711
Letters submitted by Ken Wolf, The Pizza Guy, John Rossi, and Mike Coyle.