- Script
- Gerry Conway
- Pencils
- Jim Janes
- Inks
- John Calnan
- Colors
- Gene D'Angelo
- Letters
- John Costanza
- Job Number
- J-6855
- Genre
- science fiction; superhero
- Characters
- Legion of Super-Heroes [Timber Wolf; Light Lass; Lightning Lad; Saturn Girl; Colossal Boy; Princess Projectra; Wildfire; Mon-El; Shadow Lass; Shrinking Violet]; Dark Man; Fatal Five [Emerald Empress; Mano; The Persuader; Validus; Tharok]; Blok; Marte Allon
- Synopsis
- The Legionnaires discover that the Dark Man is a clone of Tharok, and they form a temporary alliance with the Fatal Five to defeat him.
- Reprints
Colossal Boy's mother, Marte Ida Allon, is elected President of Earth.
- Script
- Jack C. Harris
- Pencils
- ?
- Inks
- ?
- Colors
- ?
- Letters
- typeset
- Job Number
- L-640
- Reprints
Letters submitted by David Scott and Alicia Wu.