Legion of Super-Heroes [Brainiac 5; Cosmic Boy; Superboy; Shadow Lass]; Cosmic Boy impostor; Shadow Lass impostor; Legion of Substitute-Heroes [Fire Lad; Stone Boy; Chlorophyll Kid]
Synopsis
Two impostor Legionnaires ransack the old Legion clubhouse to find a gem they hid years ago, but they run into the Legion of Substitute-Heroes who have come to claim the headquarters and make it their own.