Newlyweds Lightning Lad and Saturn Girl retire from the team, but Arma Getten kidnaps R.J. Brande and sends the Legion to retrieve three items as a ransom!

The Legion battles the force behind the Dark Circle's plan to conqueror the Earth! If they fail, the Earth and the entire galaxy will fall to the power of the mad magician Mordru!

Tharok plans to remake Corvan IV the way the Fatal Five wants it, but the Legion steps in.

Ambassador Relnic and the Dominators vanish during peace talks on Weber's World and the Khunds invade Earth with only the Legion of Substitute Heroes as a last defense!

The Legion subject Superboy to a medical treatment that is really a "hypno-block" that prevents him from retaining information about an extended life serum and from wondering why his teammates age so slowly.

During the Khunds' invasion of Earth, former Legionnaires Lightning Lad, Saturn Girl, Bouncing Boy, and Duo Damsel return to defend the Legion armory! Plus, the Legion discovers who really started the war!

The Legion takes Brainiac 5 to an amusement park in order to show him illusions of his past.

The Legion hunt down a space dragon whose radioactive scales help the people of Imsk maintain their shrinking powers. When too many scales are removed at once, the dragon explodes and merges Shrinking Violet, Colossal Boy, Lightning Lad and Saturn Girl into a berserk composite Legionnaire.

Chameleon Boy announces that Ultra Boy was framed for the murder of An Ryd, but before the full truth comes out the Legion must deal with the threat of Omega, a giant creature claiming to be the embodiment of all the hate in the universe.

The Legion's Klordny Festival celebrations are interrupted when a mysterious spore fog causes people to shrink. Also, the Immune seeks revenge on R.J. Brande.