Issue 1
Superboy and the Legion of Super-Heroes (1977-) #231
As the Legion attempts to evacuate the planet Mordan before its star goes nova, they are confronted by the Fatal Five, who want the inhabitants of Mordan to be converted into priceless energite when their star explodes and have taken Karate Kid and Princess Projectra hostage to make sure the Legion doesn't interfere. And, after delaying the Legion's efforts to save the inhabitants of Mordan, the Fatal Five regroup on Tharok's ship. The Legion mounts a sneak attack on the ship and tricks Tharok into revealing the location of the control for the device causing the star to go nova.
Issue 2
Superboy and the Legion of Super-Heroes (1977-) #232
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.
Issue 3
Superboy and the Legion of Super-Heroes (1977-) #233
Prof. Jaxon Rugarth volunteers for a time-travel experiment at the Time Institute that drives him mad and changes him into the Infinite Man, who can summon any creature from any era to destroy the Legion and Rond Vidar.
Issue 4
Superboy and the Legion of Super-Heroes (1977-) #234
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.
Issue 5
Superboy and the Legion of Super-Heroes (1977-) #235
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.
Issue 6
Superboy and the Legion of Super-Heroes (1977-) #236
The Legion must stop Worldsmith from transforming the surface of Braal in "Mon-El's One-Man War!"
Mon-El protects a United Planets experimental star-mining installation from a Khund attack.
And at the Science Police Academy on Titan, Saturn Girl and Lightning Lad enter a Sensacomp Simulator to help them clarify the choice between marring and leave the Legion...or remaining single and staying with the team.
Issue 7
Superboy and the Legion of Super-Heroes (1977-) #237
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!
Issue 8
Superboy and the Legion of Super-Heroes (1977-) #238
When the new United Planets President outlaws the Legion, some are sent to the Takron-Galtos prison planet, some are imprisoned on Earth and the rest go underground.
The Legionnaires who went underground break out the Legionnaires imprisoned on Earth.
The Legionnaires on Earth uncover the President's scheme and expose him as the mind-controlling Universo.
Issue 9
Superboy and the Legion of Super-Heroes (1977-) #239
When Ultra Boy is framed for the murder of an old girlfriend, An Ryd, he must prove his innocence before the Legion can find him and bring him to jail!
Issue 10
Superboy and the Legion of Super-Heroes (1977-) #240
Grimbor wants revenge on the Legion after the death of Charma in prison.
While still a student at the Legion Academy, Dawnstar recounts her origin and learns teamwork when she tries to round up two escaped creatures by herself.
Issue 11
Superboy and the Legion of Super-Heroes (1977-) #241
The Legion tries to prevent the Resource Raiders from stealing rare metals from Antarctica while Mon-El, Dawnstar, Wildfire, and Ultra Boy discover sabotage on Weber's World just before negotiations between the United Planets and the Dominators are to begin!
Issue 12
Superboy and the Legion of Super-Heroes (1977-) #242
The Legion tries to halt the Khunds' invasion of Earth. Plus, a group of thieves plans to execute three heists from a flying restaurant—where four Legionnaires just so happen to be taking the night off from super hero work!
Issue 13
Superboy and the Legion of Super-Heroes (1977-) #243
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!
Issue 14
Superboy and the Legion of Super-Heroes (1977-) #244
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!
Issue 15
Superboy and the Legion of Super-Heroes (1977-) #245
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!
Issue 16
Superboy and the Legion of Super-Heroes (1977-) #246
People are disappearing on Mercury, and the Legion tries to get to the bottom of things.
Issue 17
Superboy and the Legion of Super-Heroes (1977-) #247
Tharok plans to remake Corvan IV the way the Fatal Five wants it, but the Legion steps in.
Issue 18
Superboy and the Legion of Super-Heroes (1977-) #248
Shadow Lass gets hurt during a Legion battle against a plant creature.
Issue 19
Superboy and the Legion of Super-Heroes (1977-) #249
The Legion gets to the bottom of the plant-monster infestation in the sewers.
Issue 20
Superboy and the Legion of Super-Heroes (1977-) #250
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.
Issue 21
Superboy and the Legion of Super-Heroes (1977-) #251
An insane Brainiac 5 faces the Legion as they try to take from him the secret of how to destroy Omega.
Issue 22
Superboy and the Legion of Super-Heroes (1977-) #252
The Starburst Bandits try to make the sun go nova, but the Legion has something to say about it.
Issue 23
Superboy and the Legion of Super-Heroes (1977-) #253
Five youths seek revenge on six Legionnaires. They believe the heroes destroyed their home planet. They easily defeat five of them and go after their final victim...Superboy.
Issue 24
Superboy and the Legion of Super-Heroes (1977-) #254
Brainiac 5 enlists the Legion of Substitute Heroes for assistance against the Super-Assassins.
Issue 25
Superboy and the Legion of Super-Heroes (1977-) #255
The Legion travels back in time to Krypton on the day of its destruction in order to save the citizens of 30th Century Tokyo.
Issue 26
Superboy and the Legion of Super-Heroes (1977-) #256
The Legion takes Brainiac 5 to an amusement park in order to show him illusions of his past.
Issue 27
Superboy and the Legion of Super-Heroes (1977-) #257
The Legion tries to get to the bottom of the bankruptcy of R.J. Brande.
Issue 28
Superboy and the Legion of Super-Heroes (1977-) #258
The Legion discovers that the president of Earth has been siphoning funds from R.J. Brande to rebuild the planet, just before the super-team is attacked by a villain called the Psycho-Warrior.