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?
Have you ever wondered what became of all those rejected Legion applicants over the years? You might get an idea when you meet one of them: Zac Ammen, who as Foresight has the limited power to see events in his own future! Guest starring Mon-El, as well as the Legion of Super-Heroes from several years ago!
Science Police Officer Gigi Cusimano just can’t seem to catch a break. Temporarily assigned as liaison officer to the Legion of Substitute Heroes, currently on the orbiting hospital called Multivac, she finds herself hospitalized when exposed to a combination of Infectious Lass’ germs and Porcupine Pete’s quills! But the worst is to come when the Subs decide to hold tryouts to recruit new members, with typically disastrous results! Introducing a new team lineup for the Subs!