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?
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!
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!