- Script
- Paul Levitz
- Pencils
- Joe Staton
- Inks
- Murphy Anderson
- Colors
- Cory Adams
- Letters
- Ben Oda
- Job Number
- J-5434
- Genre
- superhero
- Characters
- Legion of Super-Heroes [Superboy; Karate Kid; Brainiac 5; Chameleon Boy; Colossal Boy; Cosmic Boy; Dawnstar; Dream Girl; Element Lad; Light Lass; Mon-El; Phantom Girl; Princess Projectra; Shadow Lass; Shrinking Violet; Star Boy; Sun Boy; Timber Wolf; Ultra Boy; Wildfire]; Saturn Girl; Lightning Lad; Bouncing Boy; Duo Damsel; Mordru; Dark Circle; Khunds; Dominators; Ambassador Relnic; Ontiir; Legion of Substitute Heroes (cameo) [Chlorophyll Kid; Color Kid; Fire Lad; Night Girl; Polar Boy; Stone Boy]; President Kandru
- Synopsis
- The Legion battle Mordru, who is revealed as the force behind the Dark Circle's plan to conqueror the Earth.
- Reprints
Pages 1-5 of a 25-page story.
- Script
- Al Milgrom; Paul Levitz
- Letters
- typeset
- Job Number
- L-143
Letters from: Beppe Sabatini, Sheryl Fuller. Al Milgrom takes credit for fill in inking in issue #240.