The Legion of Super-Heroes must find out whether the assassin they’re searching for is really their long-dead teammate or merely a double or clone! But when they do finally capture him and discover the truth, what will that mean for the team? Meanwhile, the head of the League of Assassins decides to cut off that organization’s weakest link and destroy the Legion at the same time!
A dead warrior is brought back to life for the purposes of an ancient, evil organization! And when a visitor is assassinated at the Legion Academy, it’s up to the Legion of Super-Heroes to find out who’s behind it! But as they investigate the murder, are they prepared to learn the identity of the assassin? Can they think the unthinkable?
A discovery on Pluto leads the Legion of Substitute Heroes and guest star Cosmic Boy to face a strange and tragic menace from a thousand years in the past! But will Prometheus of the Hybrid end up being a hero or a villain in this new era?
The Dark Circle returns from a long period of dormancy to strike again! But as they begin using germ warfare, can the Legion of Super-Heroes stop them in time to prevent plagues and death on a massive scale? And are the Legionnaires being distracted from the real threat? Guest starring Dev-Em!
It’s a race against time as the Legion of Super-Heroes tries to learn how an odd theft of soil-digging machines could threaten the freedom of Earth! Featuring the return of the Legion’s old foes the Emerald Empress and Modulus, and introducing the new Reflecto!
When three members of the Legion of Substitute Heroes commit a daring robbery, the Legion of Super-Heroes faces the possibility that the Subs may have gone bad. But as it soon becomes evident, these are evil doubles from a parallel universe. Can the Legion defeat evil counterparts of its own members? Introducing the Legion of Ultra-Villains!