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Action Comics #274
DC
•
1961
•
Vol. 1
Non-Key
Action Comics #275
DC
•
1961
•
Vol. 1
First mention of Superman's Heat Vision power - previous issues demonstrated his X-Ray vision having powers to melt glaciers
Debut of Red/Green Kryptonite - causes mutations including an extra eye on the back of Superman's head
First mention of Superman's Heat Vision power - previous issues demonstrated his X-Ray vision having powers to melt glaciers
Debut of Red/Green Kryptonite - causes mutations including an extra eye on the back of Superman's head
Action Comics #276
DC
•
1961
•
Vol. 1
1st appearance of Sun Boy, a solar-powered member of the Legion of Super-Heroes
1st appearance of Phantom Girl, a member of the Legion of Super-Heroes who has the ability to phase through objects
1st appearance of Triplicate Girl, a member of the Legion of Super-Heroes who can split into three identical bodies
1st appearance of Bouncing Boy, a density-changing member of the Legion of Super-Heroes
1st appearance of Shrinking Violet, a member of the Legion of Super-Heroes who can shrink to sub-atomic size
1st appearance of Braniac 5, a genius and time-traveling member of the Legion of Super-Heroes
Supergirl joins the Legion of Super-Heroes
1st appearance of Sun Boy, a solar-powered member of the Legion of Super-Heroes
1st appearance of Phantom Girl, a member of the Legion of Super-Heroes who has the ability to phase through objects
1st appearance of Triplicate Girl, a member of the Legion of Super-Heroes who can split into three identical bodies
1st appearance of Bouncing Boy, a density-changing member of the Legion of Super-Heroes
1st appearance of Shrinking Violet, a member of the Legion of Super-Heroes who can shrink to sub-atomic size
1st appearance of Braniac 5, a genius and time-traveling member of the Legion of Super-Heroes
Supergirl joins the Legion of Super-Heroes
Action Comics #277
DC
•
1961
•
Vol. 1
Non-Key
Action Comics #278
DC
•
1961
•
Vol. 1
Non-Key
Action Comics #279
DC
•
1961
•
Vol. 1
1st appearance of Lesla-Lar, a Kryptonian who escaped from the bottled city of Kandor
1st appearance of Lesla-Lar, a Kryptonian who escaped from the bottled city of Kandor
Action Comics #280
DC
•
1961
•
Vol. 1
Non-Key
Action Comics #281
DC
•
1961
•
Vol. 1
Non-Key
Action Comics #282
DC
•
1961
•
Vol. 1
Non-Key
Action Comics #283
DC
•
1961
•
Vol. 1
Non-Key
Action Comics #284
DC
•
1961
•
Vol. 1
Non-Key
Action Comics #285
DC
•
1962
•
Vol. 1
Supergirl is introduced to the world
Classic cover art by Curt Swan
Supergirl is introduced to the world
Classic cover art by Curt Swan
Action Comics #286
DC
•
1962
•
Vol. 1
Non-Key
Action Comics #287
DC
•
1962
•
Vol. 1
Non-Key
Action Comics #288
DC
•
1962
•
Vol. 1
Non-Key
Action Comics #289
DC
•
1962
•
Vol. 1
1st appearance of Luma Lunai, an alien woman whose powers would not function under the yellow sun of Earth
In the story where Supergirl attempts to find a wife for Superman, he discloses to here that he would marry her if Earth's laws allowed cousins to be wed - tap cover and swipe to view panel
1st appearance of Luma Lunai, an alien woman whose powers would not function under the yellow sun of Earth
In the story where Supergirl attempts to find a wife for Superman, he discloses to here that he would marry her if Earth's laws allowed cousins to be wed - tap cover and swipe to view panel
Action Comics #290
DC
•
1962
•
Vol. 1
Non-Key
Action Comics #291
DC
•
1962
•
Vol. 1
First meeting of Supergirl and Mr. Mxyzptlk
Action Comics #292
DC
•
1962
•
Vol. 1
Non-Key
Action Comics #293
DC
•
1962
•
Vol. 1
Origin of Comet the Superhorse
Action Comics #294
DC
•
1962
•
Vol. 1
Non-Key
Action Comics #295
DC
•
1962
•
Vol. 1
Non-Key
Action Comics #296
DC
•
1962
•
Vol. 1
Non-Key
Action Comics #297
DC
•
1962
•
Vol. 1
Non-Key
Action Comics #298
DC
•
1963
•
Vol. 1
Non-Key
Action Comics #299
DC
•
1963
•
Vol. 1
Non-Key
Action Comics #300
DC
•
1963
•
Vol. 1
Milestone issue Action Comics issue #300
Action Comics #301
DC
•
1963
•
Vol. 1
Non-Key
Action Comics #302
DC
•
1963
•
Vol. 1
Non-Key
Action Comics #303
DC
•
1963
•
Vol. 1
Non-Key
Action Comics #304
DC
•
1963
•
Vol. 1
1st appearance of the Black Flame, Zora Vi-Lar, a criminal from Krypton
1st appearance of the Black Flame, Zora Vi-Lar, a criminal from Krypton
Action Comics #305
DC
•
1963
•
Vol. 1
Non-Key
Action Comics #306
DC
•
1963
•
Vol. 1
Non-Key
Action Comics #307
DC
•
1963
•
Vol. 1
Non-Key
Action Comics #308
DC
•
1963
•
Vol. 1
Non-Key
Action Comics #309
DC
•
1964
•
Vol. 1
Appearance of President John F. Kennedy who had been assassinated days before the issue went on sale
The mystery masquerader on the cover is JFK in disguise to help Superman conceal his identity
Appearance of President John F. Kennedy who had been assassinated days before the issue went on sale
The mystery masquerader on the cover is JFK in disguise to help Superman conceal his identity
Action Comics #310
DC
•
1964
•
Vol. 1
Debut of Jewel Kryptonite
Enhances the mental abilities of criminals trapped inside the Phantom Zone to affect events throughout the universe
Debut of Jewel Kryptonite
Enhances the mental abilities of criminals trapped inside the Phantom Zone to affect events throughout the universe
Action Comics #311
DC
•
1964
•
Vol. 1
Non-Key
Action Comics #312
DC
•
1964
•
Vol. 1
Non-Key
Action Comics #313
DC
•
1964
•
Vol. 1
Non-Key
Action Comics #314
DC
•
1964
•
Vol. 1
Non-Key
Action Comics #315
DC
•
1964
•
Vol. 1
1st appearance Zigi and Zagi
⚠ Misconception: CGC mislabels Action Comics #316 as the first appearance of Zigi and Zagi
1st appearance Zigi and Zagi
⚠ Misconception: CGC mislabels Action Comics #316 as the first appearance of Zigi and Zagi
Action Comics #316
DC
•
1964
•
Vol. 1
Non-Key
Action Comics #317
DC
•
1964
•
Vol. 1
Non-Key
Action Comics #318
DC
•
1964
•
Vol. 1
Non-Key
Action Comics #319
DC
•
1964
•
Vol. 1
Non-Key
Action Comics #320
DC
•
1964
•
Vol. 1
Non-Key
Action Comics #321
DC
•
1964
•
Vol. 1
Non-Key
Action Comics #322
DC
•
1965
•
Vol. 1
Non-Key
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