Legion Publication History/1958-1964

1950
July
	Superman v1 #66 (published July 7, 1950; cover date September/October, 1950) "The Last Days of Superman" Plot unknown. Later rewritten to become "The Last Days of Superman!" in Superman v1 #156, October, 1962
1952
November
	Superman v1 #80 (published November 5, 1952, cover date February 1953) "Superman's Big Brother!" Superman mistakes an amnesiac space traveler for his long-lost older brother. (Later rewritten to become "Superboy's Big Brother!" in Superboy v1 #89, June, 1961. 1st app. Halk Kar.)
1953
June
	Adventure Comics #191 (published June 4, 1953, cover date August 1953) "The Two Clark Kents!" A juvenile delinquent tries to take over the life of his look alike, Clark Kent. (Story later rewritten to become "The Secret of the Seventh Super-Hero!" in Adventure Comics #290)
October
	Adventure Comics #195 (published October 28, 1953, cover date December 1953) "Lana Lang's Romance on Mars!" Lana Lang tries to make Superboy jealous by dating the new hero, Mars Boy. (Later rewritten to become "Lana Lang and the Legion of Super-Heroes!" in Adventure Comics #282)
1958
February
	Adventure Comics #247 (published February 27, 1958, cover date April 1958) "The Legion of Super-Heroes!" Superboy is invited to travel to the 30th century and join a teenage super-hero club where a series of initiation stunts tests his powers, and his sportsmanship. (1st app. the Legion of Super-Heroes, Cosmic Boy, Lightning Lad, Saturn Girl, Legion Clubhouse, and the Legion Time Bubble. Superboy joins Legion)
May
	Adventure Comics #250 (published May 29, 1959, cover date July 1958) "The Imposter From the Year 2958!" Superboy must figure out which citizen of Smallville has been kidnapped and impersonated by a criminal from the 30th century. (No Legion content, but story is set in Legion’s timeframe after its debut.)
July
	Superman’s Pal, Jimmy Olsen #31 (published July 17, 1958, cover date September 1958) "The E-l-a-s-t-i-c Lad!" Plot unknown. (1st app. of Jimmy Olsen in his Elastic Lad identity)
1959
April
	Superman’s Pal, Jimmy Olsen #37 (published April 7, 1959, cover date June 1959) "The Elastic Lad of Metropolis!" Plot unkown. (App. Elastic Lad)
August
	Wonder Woman #101 (published August 14, 1959, cover date October 1959) "Fun House of Time!" Plot unkown. (Villain later revealed to have been the Time Trapper)
October
	Adventure Comics #267 (published October 29, 1959, cover date December 1959) "Prisoner of the Super-Heroes!" Superboy is imprisioned by the Legion, who believe he has turned evil. (New costumes, Cosmic Boy, Lightning Lad & Saturn Girl)
1960
May
	Superman's Pal, Jimmy Olsen #46 (published May 19, 1960, cover date July 1960) "Elastic Lad's Greatest Feats!" Plot Unknown. (App. Elastic Lad)
June
	Action Comics #267 (published June 30, 1960, cover date August 1960) "The Three Super-Heroes!" Supergirl is invited to try out for the Legion, only to be rejected when red kryptonite ages her into a Super Woman. (1st app. Chameleon Boy, Colossal Boy and Invisible Kid. 1st mention of 18-year-old age limit)
November
	Superboy #86 (published November 17, 1960, cover date January 1961) "The Army of Living Kryptonite Men!" Lex Luthor uses kryptonite men made of irradiated meteors to battle Superboy. (App. Lightning Lad, cameo Cosmic Boy & Saturn Girl. 1st reference to a Legion of Super-Villains)
December
	*Superman's Girlfriend, Lois Lane #23 (published December 22, 1960, cover date February 1961) "The 10 Feats of Elastic Lass!" Unknown Plot. (Lois uses Jimmy Olsen's Elastic Lad serum)
1961
January
	Adventure Comics #282 (published January 31, 1961, cover date March 1961) "Lana Lang and the Legion of Super-Heroes!" Lana tries to make Superboy jealous by feigning interest in a new hero. (1st app. & origin Star Boy, who is revealed to be a Legion member. Cameo app. Chameleon Boy, Cosmic Boy, Lightning Lad & Saturn Girl)
March
	Action Comics #276 (published March 30, 1961, cover date May 1961) "Supergirl's Three Super-Girlfriends!" Supergirl is again invited to try out for Legion membership, earning her way in by unearthing valuable antiquities while Brainiac 5 is inducted for "noble courage" in risking his life to save hers. (1st app. Phantom Girl & Triplicate Girl, both revealed to be Legion members. 1st app. Bouncing Boy, Brainiac 5, Shrinking Violet & Sun Boy as Legion applicants. Origin Brainiac 5)
April
	Superboy v1 #89 (published April 6, 1961, cover date June 1961) "Superboy's Big Brother!" Superboy mistakes an amnesiac space traveler for his long-lost older brother, than inadvertantly poisons him while trying to uncover his "real identity." (1st app. & origin Mon-El, 2nd app. Phantom Zone)
	Action Comics #277 (published April 27, 1961, cover date June 1961) "The Battle of the Super-Pets!" Plot unknown. (1st meeting of Krypto, Streaky & Beppo)
May
	Superman's Pal, Jimmy Olsen #54 (published May 18, 1961, cover date July 1961) "Elastic Lad's Wrestling Match!" Unknown plot. (App. Elastic Lad)
June
	Superman #147 (published June 13, 1961, cover date August 1961) "The Legion of Super-Villains!" The Legion of Super-Villains recruits Lex Luthor in an attempt to humiliate the Legion by destroying Superman. (1st app. LSV, the Adult Legion, Cosmic Man, Lightning Man & Saturn Woman. 1st app. & origin Cosmic King, Lightning Lord & Saturn Queen. Origin Lightning Lad)
	Adventure Comics #287 (published June 29, 1961, cover date August 1961) "War of the Superboys!" A Kryptonian juvenile delinquent arrives to make trouble for Superboy on Earth. (1st app. Dev-Em)
July
	Adventure Comics #288 (published July 27, 1961, cover date September 1961) "The Knave from Krypton!" A Kryptonian juvenile delinquent wrecks havoc disguised as Superboy before getting flung into the far future. (2nd App. Dev-Em)
August
	Superman's Girlfriend, Lois Lane #28 (published August 8, 1961, cover date October 1961) "The Lois Lane of the Future!" Superman meets Lois 4xR in a future world where everybody has super-powers. (Set in 30th century)
	Adventure Comics #289 (published August 31, 1961, cover date October 1961) "Clark Kent's Super Father!" A kyptonian criminal escapes from the Phantom Zone and poses as Pa Kent. (Cameo Legion statuettes)
September
	Superman #149 (published September 14, 1961, cover date November 1961) "The Death of Superman!" Luthor pretends to reform before successfully killing Superman [Imaginary story/Elseworlds]. (Legion cameo at Superman's funeral)
	Action Comics #282 (published September 28, 1961, cover date November 1961) "The Supergirl of Tomorrow!" In an effort to restore her lost super-powers, Superman sends Supergirl into the far future. (Cameo Brainiac 5 & Legion Time Bubble)
	Adventure Comics #290 (published September 28, 1961, cover date November 1961) "The Secret of the Seventh Super-Hero!" A juvenile delinquint lookalike for Clark Kent tries to take over his life. (Sun Boy revealed to be a Legion member)
October
	Superboy v1 #93 (published October 5, 1961, cover date December 1961) "Lana Lang's Superboy Identity Detection Kit!" Lana tries to uncover Superboy's secret identity. (App. Chameleon Boy)
	Superman's Pal, Jimmy Olsen #57 (published October 5, 1961, cover date December 1961) Has ad for Adventure Comics #290 with seven Legionnaires pictured. 1st Legion house ad?
	Action Comics #283 (published October 26, 1961, cover date December 1961) "The Red Kryptonite Menace!" Chameleon Men from the 30th century, members of the Legion of Super-Outlaws, try and locate kryptonite in an effort to destroy Superman. (Mention Cosmic King & Lightning Lord) "The Six Red 'K' Perils of Supergirl!" Supergirl battles against red kryptonite and Mr. Mxytzplk. (Superman mentions Legion)
November
	Superman Annual v1 #4 (published November 9, 1961, cover date 1962) "The Origins and Powers of the Legion of Super-Heroes!" (2-page profile of the Legion, 1st mention of many civilian identities, homeworlds and origins.)
	Action Comics #284 (published November 30, 1961, cover date January 1962) "The Babe of Steel!" Superman learns of a portal that will allow Kryptonian criminals to escape the Phantom Zone. (App. Mon-El)
December
	Superman's Girlfriend, Lois Lane #31 (published December 26, 1961, cover date February 1962) Has ad for Adventure Comics #293 mentioning the Super-Pets.
	Action Comics #285 (published December 28, 1961, cover date February 1962) "The World's Greatest Heroine!" Superman reveals Supergirl's existence to the world and the Legion helps her defeat the Infinite Monster. Brainiac 5, Cosmic Boy, Lightning Lad and Saturn Girl appear on three pages
	Adventure Comics #293 (published December 28, 1961, cover date February 1962) "The Legion of Super-Traitors!" With the Legion's help, Superboy battles aliens bent on moving the Earth to another solar system. (1st app. Legion of Super-Pets and Comet the Super-Horse. 1st app. & origin the Brain Globes of Rambat)
1962
January
	Action Comics #286 (published January 30, 1962, cover date March 1962) "The Jury of Super-Enemies!" Plot unknown. (2nd app. LSV with Luthor, Brainiac & Electro as members, cameo in a dream sequence)
February
	Superman #152 (published February 6, 1962, cover date April 1962) "The Robot Master!" Superman is plagued by robot versions of his closest friends. (App. Legion)
	Action Comics #287 (published February 27, 1962, cover date April 1962) "Supergirl's Greatest Challenge!" Supergirl battles chameleon men impersonating the Legion. (Legion app. 1st app. Whizzy)
March
	Superman's Girlfriend, Lois Lane #33 (published March 27, 1962, cover date May 1962) "The Phantom Lois Lane!" Plot unknown (Cameo Mon-El)
	Action Comics #288 (published March 29, 1962, cover date May 1962) "The Man Who Made Supergirl Cry!" Plot unknown. (App. Mon-El.)
April
	Action Comics #289 (published April 26, 1962, cover date June 1962) "Superman's Super-Courtship!" Supergirl searches many worlds and times to find a suitable wife for Superman. (2nd app. Adult Legion, 1st mention marriage of Lightning Lad & Saturn Girl.)
May
	Superboy #98 (published May 17, 1962, cover date July 1962) "The Boy with Ultra Powers!" Ultra Boy travels to the 20th century in an attempt to uncover Superboy's secret identity as part of his Legion initiation. (1st app. & origin Ultra Boy. 1st app. Marla Latham. Pete Ross joins Legion)
	Superman's Pal, Jimmy Olsen #62 (published May 24, 1962, cover date July 1962) "Superman's Phantom Pal!" Plot unknown. (App. Elastic Lad, cameo Mon-El)
	Action Comics #290 (published May 29, 1962, cover date July 1962) "Supergirl's Super Boyfriends!" Red kryptonite exposure causes Supergirl to bestow super-powers with a kiss. (App. Phantom Girl, Legion statutette)
June
	Superman #155 (published June 21, 1962, cover date August 1962) "The Downfall of Superman!" Superman switches placed with a famous wrestler in an attempt to capture gangsters. (App. Cosmic Man & Lightning Man.)
	Adventure Comics #299 (published June 28, 1962, cover date August 1962) Letters column mentions new Legion series starting next issue.
July
	Superman's Pal, Jimmy Olsen #63 (published July 5, 1962, cover date September 1962) "The League of Fantastic Supermen!" Plot unknown. (3rd app. LSV. 1st app Chameleon Chief & Sun Emperor)
	Adventure Comics #300 (published July 26, 1962, cover date September 1962) "The Face Behind the Lead Mask!" The Legion fights a robot created by Lex Luthor. (Begins first ongoing Legion series. Mon-El joins Legion)
August
	Superman #156 (published August 2, 1962, cover date October 1962) "The Last Days of Superman!" Superman succumbs to Virus X and enlists the aid of various heroes to help him perform charitable deeds before he dies. (App. Legion)
	Superboy #100 (published August 21, 1962, cover date October 1962) "The Day Pete Ross Became a Robot!" Plot unknown. (App. Legion)
	Superman's Pal, Jimmy Olsen #64 (published August 21, 1962, cover date October 1962) "Jimmy Olsen, Hollywood Star!" Plot unknown. (Superman mentions Legion)
	Adventure Comics #301 (published August 28, 1962, cover date October 1962) "The Secret Origin of Bouncing Boy!" To encourage a group of Legion applicants, Bouncing Boy relates how he joined the team. (Origin Bouncing Boy.)
September
	Superman #157 (published September 20, 1962, cover date November 1962) "The Super-Revenge of the Phantom Zone Prisoner!" Plot unknown. (Cameo Mon-El) "Superman's Day of Doom!" Superman learns he will be saved by someone with the initials L.L. (Cameo Lightning Lad & Cosmic Boy)
	Action Comics #294 (published September 27, 1962, cover date November 1962) "The Kryptonite Killer!" Plot unknown. (Cameo Saturn Queen)
	Adventure Comics #302 (published September 27, 1962, cover date November 1962) "Sun Boy's Lost Power!" Sun Boy is drummed out of the Legion when his super-powers fade.
	Superman's Girlfriend, Lois Lane #37 (published September 27, 1962, cover date November 1962) Has ad for Adventure Comics #302 with title changed to "The End of Sun-Boy!"
October
	Superboy #101 (published October 4, 1962, cover date December 1962) “The Valhalla of the Super-Companions!” An alien forces heroes from several worlds to live on his, only to send them packing when they outstay their welcome. (Story later reused with new title and art changes as “When Superboy Walked Out on the Legion!” in Adventure Comics #371, August, 1968)
	Action Comics #295 (published October 30, 1962, cover date December 1962) "Superman Goes Wild!" Plot unknown. (Cameo Mon-El) an ad promotes “The Fantastic Spy!” in Adventure Comics #303
	Adventure Comics #303 (published October 30, 1962, cover date December 1962) "The Fantastic Spy!" The Legion fails several assignments thanks to a traitor in their midst. (1st app. Matter-Eater Lad, joins Legion)
November
	Superman Annual v1 #6 (published November 15, 1962, cover date Winter 1962-63) 1st Reprint “The Legion of Super-Heroes!” from Adventure Comics #247, April 1958, with final page cut, “Lightning Boy” relettered to “Lightning Lad” and some characters recolored. “The Superman Family” Back-cover poster. (Cameo, Cosmic Boy, Chameleon Boy, Lightning Lad, Saturn Girl & Sun Boy.)
	Adventure Comics #304 (published November 29, 1962, cover date January 1963) "The Stolen Super-Powers!" Knowing a Legionnaire will die, Saturn Girl conspires to expel all members so she can face an invading force on her own. (Death of Lightning Lad.) “Smallville Mailsack” Letters page. (Buddy LaVigne of Northbrook, IL, defines "Bits of Legionnaire Business" and invents Polar Boy)
December
	Action Comics #297 (published December 27, 1962, cover date February 1963) "The Forbidden Weapons of Krypton!" Kryptonian criminals escape from the Phantom Zone. (Cameo Mon-El) Legion mentioned in house ad for Adventure Comics #305
	Adventure Comics #305 (published December 27, 1962, cover date February 1963) "The Secret of the Mystery Legionnaire!" A mysterious hero tries out for Legion membership. (Mon-El leaves Phantom Zone, joins Legion full time. 1st app. Antennae Boy) "Clark Kent, He-Man!" The Kent family moves to a new town where Superboy wears a mask and Clark Kent no longer has to pretend to be weak and timid. (App. Chameleon Boy.)
1963
January
	Action Comics #298 (published January 31, 1963, cover date March 1963) "The Super-Powers of Lex Luthor!" Supergirl battles a group of Phantom Zone criminals. (Cameo Cosmic Boy, Lightning Lad & Saturn Girl) House ad for Adventure Comics #306 mentions all Substitute Heroes by name
	Adventure Comics #306 (published January 31, 1963, cover date March 1963) "The Legion of Substitute-Heroes!" A group of rejected applicants forms a secret back-up team to the Legion. (1st app. & origin Legion of Substitute Heroes. 1st app. & origins Chlorophyll Kid, Fire-Lad, Night Girl, Polar Boy and Stone Boy)
February
	Superman's Pal, Jimmy Olsen #68 (published February 21, 1963, cover date April 1963) Unknown Title (Cameo Elastic Lad and, on a bracelet, Chameleon Boy, Saturn Girl & Sun Boy) Has an ad for Adventure Comics #307 with Element Lad pictured as "Mystery Lad"
	Action Comics #299 (published February 28, 1963, cover date April 1963) "The Story of Superman's Experimental Robots!" Superman thinks of people he knows with the initials L.L. (Cameo Lightning Lad) has an ad for Adventure Comics #307 with Element Lad pictured as “Mystery Lad.”
	Adventure Comics #307 (published February 28, 1963, cover date April 1963) "The Secret Power of the Mystery Super-Hero!" The Legion battles space pirates while trying to guess the super-power of their newest member. (1st app. & origin Element Lad, joins Legion. 1st app. Roxxas) “Smallville Mailsack” Letters column. (Bits of Legionnaire Business begins as a regular feature)
March
	Superman #161 (published March 21, 1963, cover date May 1963) "The Last Days of Ma and Pa Kent!" Plot unknown. (Superboy mentions Mon-El)
	Adventure Comics #308 (published March 28, 1963, cover date May 1963) "The Return of Lightning Lad!" Lightning Lad comes back from the dead, but some members doubt his miraculous return. (1st app. & origin Lightning Lass, joins Legion)
April
	Action Comics #301 (published April 25, 1963, cover date June 1963) "The Secret Identity of Super-Horse!" Comet the Super-Horse gains the ability to turn into a normal man when in the presence of a comet. (1st app. planet Zerox.)
	Adventure Comics #309 (published April 25, 1963, cover date June 1963) "The Legion of Super-Monsters!" A rejected Legion applicant gathers monsters in a plot to have revenge. (1st app. Jungle King, Rainbow Girl) "The Fake Superboy from Krypton!" Superboy schemes to make an ex-convict think he was halucenating when he saw the Teen of Steel leaving the Kent farm. (App. Brainiac 5) “Bits of Legionnaire Business” (1st mention of Color Kid, Beast Boy & Life Lass)
May
	Superman #162 (published May 2, 1963, cover date July 1963) "The Amazing Story of Superman-Red and Superman-Blue!" Superman is split into two heroes, each of whom perform great feats before settling down with Lois Lane and Lana Lang. (Legion cameo)
	Superman's Pal, Jimmy Olsen #70 (published May 23, 1963, cover date July 1963) "The Secret of Silver Kryptonite!" plot. (3rd app. Element Lad.)
	Adventure Comics #310 (published May 29, 1963, cover date July 1963) "The Doom of the Super-Heroes!" One by one, Legion members are murdered by a mysterious masked villain. (1st app. Mr. Mxyzptlk in 30th century) “Bits of Legionnaire Business” (1st mention of Duplicate Boy and Spider-Girl, referred to as Spider Lass)
June
	Superman's Girlfriend, Lois Lane Annual #2 (published June 6, 1963, cover date Summer 1963) 1st reprint of “The 10 Feats of Elastic Lass!” from Superman’s Girlfriend, Lois Lane #23, February, 1961
	Adventure Comics #311 (published June 27, 1963, cover date August 1963) "The War Between the Substitute Heroes and the Legionnaires!" The Substitute Legion saves the day by defeating aliens masquraded as the real Legion. "Smallville Mailsack" Letter Column (Readers point to appearances of Lightning Man as proof that Lightning Lad cannot be dead. "Bits of Legionnaire Business" (2nd mention of Color Kid & 1st mention Evolvo Lad)
July
	Adventure Comics #312 (published July 25, 1963, cover date September 1963) "The Super-Sacrifice of the Legionnaires!" The Legion searches for a way to return a fallen member to life. (Death of Proty. Lightning Lad rejoins Legion) “Bits of Legionnaire Business” (1st mention of Blockade Boy & Weight Wizard)
August
	Superman's Pal, Jimmy Olsen #72 (published August 15, 1963, cover date October 1963) "The World of Doomed Olsens!" Jimmy is captured by the Collector and taken to a planet where he is confronted by some of his past weird transformations. Or, is he?. (Jimmy Olsen joins Legion as Elastic Lad. 1st app. Proty II)
	Adventure Comics #313 (published August 29, 1963, cover date October 1963) "The Condemned Legionnaires!" The Legion girls succumb to a crimson virus, while the boys try and stop a new female menace. (1st app. Satan Girl. 3rd app. Substitute Legion)
September
	Superman #165 (published September 19, 1963, cover date November 1963) "Beauty and the Super-Beast!" Superman comes up with an elaborate ruse to convince the Superman Revenge Squad that their counter-energy ray doesn’t work. (App. Saturn Woman & Proty II.)
	Action Comics #306 (published September 26, 1963, cover date November 1963) "The Maid of Doom!" A being poses as Superman to trick Supergirl. (Cameo Brainiac 5 & Mon-El) House ad for Adventure Comics #314 mentions Superboy, Mon-El & Ultra Boy
	Adventure Comics #314 (published September 26, 1963, cover date November 1963) "The Super-Villains of All Ages!" A rejected Legion applicant steals a Time Bubble and recruits great villains from the past, placing their minds in the bodies of the Legion’s mightiest members. (App. Hitler, Nero, John Dillenger. 1st app Ronn Kar & Alaktor. 1st mention radiation weakness for Ultra Boy) “Bits of Legionnaire Business” (1st mention of Gas Girl)
October
	Superman's Pal, Jimmy Olsen #73 (published October 10, 1963, cover date December 1963) "Jimmy’s Inter-Dimensional Romance!" Plot. (Cameo Ultra Boy) House ad for Adventure Comics #314 mentions Superboy, Mon-El & Ultra Boy
	Action Comics #307 (published October 29, 1963, cover date December 1963) "Supergirl's Wedding Day!" A Kryptonian criminal escapes from the Phantom Zone and attempts to humiliate the El family by marrying Supergirl. (App. Saturn Girl.) House ad for Adventure Comics #315 with all Substitute Heroes pictured
	Adventure Comics #315 (published October 29, 1963, cover date December 1963) "The Legionnaires Super-Contest!" The Substitute Heroes compete for Legion memership. (Legion 1st becomes aware of the Subs existence. Stone Boy declines Legion membership) "The Titanic Boy of Steel!" Superboy becomes a giant after exposure to red kryptonite and needs help to protect his secret identity. (App. Colossal Boy. Last new Superboy solo story in Adventure Comics until issue #450)
November
	Superman #166 (published November 7, 1963, cover date January 1964) "The Fantastic Story of Superman's Sons!""" Superman’s son travels to Krypton before its destruction. (App. Legion Time Bubble)
	Superman's Girlfriend, Lois Lane #46 (published November 14, 1963, cover date January 1964) Has a 1/3 page ad for Adventure Comics #316, Ultra Boy is pictured.
	Superman Annual v1 #8 (published November 21, 1963, cover date Winter 1963-64) 1st reprint of “Prisoner of the Super-Heroes!" from Adventure Comics #267, December, 1959
	Adventure Comics #316 (published November 27, 1963, cover date January 1964) "The Renegade Super-Hero!" Ultra Boy is thought to be a traitor to the Legion. (Beginning of Phantom Girl/Ultra Boy romance) "The Origins and Powers of the Legion of Super-Heroes" (Partial reprint of same feature from Superman Annual #4, 1961 with some changes and two new pages.)
December
	Superman #167 (published December 19, 1963, cover date February 1964) "The Team of Luthor and Brainiac!" Plot. (Brainiac revealed to be android, caption refers to revised ancestry of Brainiac 5)
	Action Comics #309 (published December 26, 1963, cover date February 1964) "The Superman Super-Spectacular!" President Kennedy helps Superman protect his secret identity. (App. Legion of Super-Pets)
	Adventure Comics #317 (published December 26, 1963, cover date February 1964) "The Menace of Dream Girl!" A new Legion applicant schemes to have several members removed from active duty in an attempt to prevent their deaths. (1st app. Dream Girl, who joins & resigns from Legion. Lightning Lass becomes Light Lass. 1st mention Time Trapper)
	Superman's Girlfriend, Lois Lane #47 (published December 26, 1963, cover date February 1964) "The Super-Life of Lois Lane!" An “imaginary tale,” in which it is Lois Lane, not Kal-El, who travels from Krypton to Earth to become a super-hero. (Cameo Night Girl, Saturn Girl & Sun Boy) Two-year subscription offer pictures Mon-El, Saturn Girl, Superboy & Ultra Boy
1964
January
	Superboy #111 (published January 2, 1964, cover date March 1964) "Krypto's Three Amazing Transformations!" Plot unknown. (Superboy mentions Ranzz twins)
	Adventure Comics #318 (published January 30, 1964, cover date March 1964) "The Mutiny of the Legionnaires!" Sun Boy succumbs to space fatigue and turns on the Legion. (2nd app. Time Trapper) “Smallville Mailsack” Letters column. (only mention of a “Super-Bird” member of the Legion of Super-Pets)
February
	Adventure Comics #319 (published February 27, 1964, cover date April 1964) "The Legion's Suicide Squad!" The Substitute succeeds, where two Legion teams failed, on a mission to destroy alien weapons. (1st app. Planetary Chance Machine)
	Superman's Pal, Jimmy Olsen #76 (published February 27, 1964, cover date April 1964) "Elastic Lad Jimmy and his Legion Romances!" The Legion girls feign interest in Jimmy to help him impress his would-be girlfriend, Lucy Lane. (App. Light Lass, Saturn Girl & Triplicate Girl)
March
	Adventure Comics #320 (published March 26, 1964, cover date May 1964) "The Revenge of the Knave from Krypton!" Superboy takes the place of Dev-Em in an attempt to capture Morlock the Merciless. (3rd app. Dev-Em. 1st partial reprint of “The War of the Superboys!” from Adventure Comics #287 and “The Knave From Krypton!” from Adventure Comics #288) “The Legion Outpost” Letters column. (Feature changes name to reflect Legion takeover of title)
April
	Superman's Pal, Jimmy Olsen #77 (published April 9, 1964, cover date June 1964) "The Colossus of Metropolis!" Jimmy grows to giant size to battle Titano, the Super-Ape. (Jimmy wears costumes of Colossal Boy, Sun Boy & Star Boy)
	Adventure Comics #321 (published April 30, 1964, cover date June 1964) "The Code of the Legion!" Lightning Lad pretends to fail a psychological test in order to expose SP Chief Wilson. (1st full app. Time Trapper. Bouncing Boy loses powers)
	World's Finest Comics #142 (published April 30, 1964, cover date June 1964) "The Composite Superman!" A janitor at the Superman Museum goes on a rampage after gaining the powers of all Legion members. (App. Legion statuettes)
May
	Superman's Girlfriend, Lois Lane #50 (published May 14, 1964, cover date July 1964) "Lois Lane's Luckiest Day!” Three girl’s join Lois Lane’s fan club and help to make it her lucky day. (App. Phantom Girl, Shrinking Violet & Triplicate Girl)
	Superboy #114 (published May 21, 1964, cover date July 1964) "Krypto's Catastrophes!" Plot unknown. (Superboy mentions Legion)
	Adventure Comics #322 (published May 28, 1964, cover date July 1964) "The Super Tests of the Super-Pets!" The Super-Pets put Proty II through his paces in a series of initiation tests. (Proty II joins Super-Pets)
June
	Adventure Comics #323 (published June 25, 1964, cover date August 1964) "The Eight Impossible Missions!" The Legion members compete to solve Proty’s puzzle and become Legion leader. (1st app. Spider-Girl & Double-Header. Saturn Girl re-elected leader) “Origin of the Legion of Substitute Heroes” (Text feature gives origin & homeworlds of the Subs.)
July
	80-Page Giant #2 (published July 2, 1964, cover date September 1964) 1st reprint of “The E-L-A-S-T-I-C Lad!” from Superman’s Pal, Jimmy Olsen #31, September, 1958
	Superman's Pal, Jimmy Olsen #79 (published July 9, 1964, cover date September 1964) "The Red-Headed Beatle of 1,000 B.C.!" A 30th century criminal escapes into the past, taking Jimmy with him. (App. Legion Time Bubble)
	Adventure Comics #324 (published July 30, 1964, cover date September 1964) "The Legion of Super-Outlaws!" The brother of a former Legion adversary tricks the super-heroes into fighting their counterparts from another world. (1st app. & origin the Heroes of Lallor, Beast Boy, Duplicate Boy, Evolvo Lad, Gas Girl and Life Lass)
August
	Superman #172 (published August 6, 1964, cover date October 1964) "The New Superman!" Plot. (Cameo Cosmic Boy, Invisible Kid & Saturn Girl)
	Adventure Comics #325 (published August 27, 1964, cover date October 1964) "Lex Luthor Meets the Legion of Super-Heroes!" Lex Luthor travels into the future, adopts a disguise, and pretends to be good for a time before turning on the Legion. “The Legion Constitution” (text feature prints “selected passages” from teams rules and regulations.)
September
	Superman #173 (published September 17, 1964, cover date November 1964) "The Triumph of Luthor and Brainiac!" Superman and Batman impersonate Luthor and Brainiac. (Cameo Legion statues of Bouncing Boy, Chameleon Boy, Cosmic Boy, Saturn Girl & Sun Boy)
	Adventure Comics #326 (published September 24, 1964, cover date November 1964) "The Revolt of the Girl Legionnaires!" Under the mental control of an alien Queen, the girl Legionnaires attempt to destroy their male teammates. (1st app. Queen Azura of Femnaz) “The Legion Constitution” (Text feature prints “selected passages” from teams rules and regulations.)
October
	Superboy #117 (published October 1, 1964, cover date December 1964) "Superboy and the 5 Legion Traitors!" Superboy is visited by evil Legion members from an alternate future world. (App. Brainiac 5, Chameleon Boy, Element Lad, Invisible Kid & Ultra Boy)
	Action Comics #319 (published October 29, 1964, cover date December 1964) "The Super-Cheat!" Supergirl tries to expose a cheater. (App. Shrinking Violet)
	Adventure Comics #327 (published October 29, 1964, cover date December 1964) "The Lone Wolf Legionnaire!" The son of a scientist mistakenly believes himself to be an inhuman android, while the true android has taken his place. (1st app. & origin Lone Wolf, later renamed Timber Wolf)
November
	Action Comics #320 (published November 25, 1964, cover date January 1965) "The Three Super-Enemies!" Plot unknown. (Superman refers to events of Superboy v1 #117)
	Adventure Comics #328 (published November 25, 1964, cover date January 1965) "The Lad Who Wrecked the Legion!" A new member convinces the Legionnaires to let him place them in suspended animation so he can augment their powers. (1st app. Command Kid)
December
	Adventure Comics #329 (published December 31, 1964, cover date February 1965) "The Bizzaro Legion!" When Bizarro is turned down for Legion membership, he uses his imperfect duplicator ray to create a Legion of his own. (1st app. Legion Flight Ring) “Know Your Legionnaires” (Text feature gives origins, powers, homeworlds and real names of all members.)