| Issue | #64 |
| Published | September 1985 |
| Cover Price | 1.50 |
| Pages | 100 |
| Editing | Nicola Cuti |
| Notes | wrap-around cover |
| Genre | superhero |
| Pencils | Paris Cullins |
| Inks | Bob Smith |
| Notes | wrap-around cover |
| Characters | Superboy; Legion of Super-Heroes [Chameleon Boy; Ultra Boy; Invisible Kid; Brainiac 5; Element Lad]; Police Chief Parker; Lana Lang |
| Synopsis | Superboy accidentally arrives in a parallel world where the Legion are villains. |
| Genre | superhero |
| Script | Jerry Siegel |
| Pencils | Curt Swan |
| Inks | George Klein |
| Colors | Shelley Eiber |
| Letters | Milt Snapinn |
| Reprinted | from Superboy (DC, 1949 series) #117 (December 1964) |
| Characters | Legion of Super-Heroes [Triplicate Girl; Cosmic Boy; Invisible Kid; Mon-El; Chameleon Boy; Star Boy; Colossal Boy; Sun Boy; Shrinking Violet]; Dynamo Boy [Vorm]; Pargg; Eye-ful Ethel; The Mess |
| Synopsis | Space pirate Vorm joins the Legion as Dynamo Boy and begins to eliminate the Legionnaires. |
| Genre | superhero |
| Script | Jerry Siegel |
| Pencils | Jim Mooney |
| Inks | Jim Mooney |
| Colors | Shelley Eiber |
| Letters | David Huffine |
| Reprinted | from Adventure Comics (DC, 1938 series) #330 (March 1965) |
| Characters | Legion of Super-Heroes [Superboy; Shrinking Violet; Cosmic Boy; Saturn Girl; Chameleon Boy; Triplicate Girl; Ultra Boy; Star Boy; Sun Boy; Brainiac 5; Colossal Boy; Element Lad; Invisible Kid; Lightning Lad; Light Lass]; Dynamo Boy |
| Synopsis | Dynamo Boy expels the remaining Legionnaires and makes plans for a new member drive. |
| Genre | superhero |
| Script | Jerry Siegel |
| Pencils | Jim Mooney |
| Inks | Jim Mooney |
| Colors | Shelley Eiber |
| Letters | David Huffine |
| Notes | Continues in next story. |
| Reprinted | from Adventure Comics (DC, 1938 series) #330 (March 1965) |
| Characters | Dynamo Boy; Golden Boy; The Polecat; Animal Lad; The Tusker; Legion of Super-Villains [Lightning Lord; Saturn Queen; Cosmic King]; Legion of Substitute-Heroes [Stone Boy; Chlorophyll Kid; Night Girl; Fire Lad; Polar Boy] |
| Synopsis | Dynamo Boy accepts as members the Legion of Super-Villains, over the Subs' objections. |
| Genre | superhero |
| Script | Jerry Siegel |
| Pencils | Jim Mooney |
| Inks | Jim Mooney |
| Colors | George Roberts |
| Letters | David Huffine |
| Notes | Story continues from previous story. |
| Reprinted | from Adventure Comics (DC, 1938 series) #331 (April 1965) |
| Characters | Dynamo Boy; Legion of Super-Villains [Lightning Lord; Cosmic King; Saturn Queen]; Legion of Super-Heroes [Superboy; Mon-El; Element Lad; Shrinking Violet; Triplicate Girl; Invisible Kid; Saturn Girl; Cosmic Boy] |
| Synopsis | The LSV turns on Dynamo Boy and sends him into the future. The ex-Legionnaires, keeping track of events from far off, challenge the LSV to a final confrontation. |
| Genre | superhero |
| Script | Jerry Siegel |
| Pencils | Jim Mooney |
| Inks | Jim Mooney |
| Colors | George Roberts |
| Letters | David Huffine |
| Reprinted | from Adventure Comics (DC, 1938 series) #331 (April 1965) |
| Characters | Legion of Super-Heroes [Superboy; Saturn Girl; Lightning Lad; Brainiac 5; Sun Boy; Ultra Boy]; Dr. Lanphier |
| Synopsis | Lightning Lad loses an arm to the Super-Moby Dick of Space. When Ultra Boy fails to subdue the space creature, Lightning Lad leads a team against it. |
| Genre | superhero |
| Script | Edmond Hamilton |
| Pencils | John Forte |
| Inks | John Forte |
| Colors | Helen Vesik |
| Letters | Milt Snapinn |
| Reprinted | from Adventure Comics (DC, 1938 series) #332 (May 1965) |
| Characters | Legion of Super-Heroes [Lightning Lad; Saturn Girl; Brainiac 5; Superboy; Colossal Boy; Ultra Boy; Sun Boy]; Dr. Lanphier |
| Synopsis | Lightning Lad shrinks the space creature to its original size with the help of the scientist who accidentally enlarged it. |
| Genre | superhero |
| Script | Edmond Hamilton |
| Pencils | John Forte |
| Inks | John Forte |
| Colors | Helen Vesik |
| Letters | Milt Snapinn |
| Reprinted | from Adventure Comics (DC, 1938 series) #332 (May 1965) |
| Characters | Legion of Super-Heroes [Chameleon Boy; Phantom Girl; Brainiac 5; Light Lass; Star Boy; Saturn Girl; Colossal Boy; Superboy; Element Lad; Lightning Lad; Triplicate Girl]; Zat-El; Leta Lal |
| Synopsis | The Legionnaires travel to the past to find out the story behind an ancient artifact which refers to a war between Earth and Krypton. The half that goes to Earth's past finds space travellers colonizing ancient Atlantis; the other half accompanies a group of Kryptonians who leave anti-scientific Krypton for Earth. |
| Genre | superhero |
| Script | Edmond Hamilton |
| Pencils | John Forte |
| Inks | George Klein |
| Colors | Karin Orlando |
| Letters | Milt Snapinn |
| Reprinted | from Adventure Comics (DC, 1938 series) #333 (June 1965) |
| Characters | Legion of Super-Heroes [Colossal Boy; Saturn Girl; Superboy; Brainiac 5; Light Lass; Star Boy; Chameleon Boy; Lightning Lad; Element Lad; Mon-El]; Zat-El; Leta Lal; Jhor Lal |
| Synopsis | While the Atlanteans and Kryptonians fight, Brainiac 5 discovers why Earth's air irritates the Atlanteans and helps them adapt to life under the sea. Later, back in the future, Superboy finds more artifacts that explain what happened to the Kryptonians. |
| Genre | superhero |
| Script | Edmond Hamilton |
| Pencils | John Forte |
| Inks | George Klein |
| Colors | Karin Orlando |
| Letters | Milt Snapinn |
| Reprinted | from Adventure Comics (DC, 1938 series) #333 (June 1965) |
| Characters | Legion of Super-Heroes [Superboy; Brainiac 5; Saturn Girl; Sun Boy; Supergirl [also as Unknown Boy]; Cosmic Boy; Chameleon Boy; Phantom Girl]; Norm Eldor |
| Synopsis | Superboy recalls a case when the Legionnaires were helped by a hero called Unknown Boy. |
| Genre | superhero |
| Script | Edmond Hamilton |
| Pencils | John Forte |
| Inks | Sheldon Moldoff |
| Colors | Jeanine Casey |
| Letters | Vivian Berg |
| Reprinted | from Adventure Comics (DC, 1938 series) #334 (July 1965) |
| Characters | Legion of Super-Heroes [Superboy; Phantom Girl; Cosmic Boy; Sun Boy; Saturn Girl; Brainiac 5; Supergirl [also as Unknown Boy]; Mon-El]; Norm Eldor |
| Synopsis | After Unknown Boy helps the Legion finish a case, Superboy figures out that under the costume is Supergirl. Supergirl then recalls going through a red kryptonite cloud and losing her memory, but knowing she had to protect her secret identity, and so creating the Unknown Boy costume. |
| Genre | superhero |
| Script | Edmond Hamilton |
| Pencils | John Forte |
| Inks | Sheldon Moldoff |
| Colors | Jeanine Casey |
| Letters | Milt Snapinn |
| Reprinted | from Adventure Comics (DC, 1938 series) #334 (July 1965) |
| Script | Nicola Cuti (p. 1, 4); E. Nelson Bridwell (p. 2-3) |
| Pencils | James Sherman (p. 1); Jim James (p. 2-3); Keith Giffen (p. 4) |
| Inks | Jack Abel (p. 1); Frank Chiaramonte (p. 2-3); Larry Mahlstedt (p. 4) |
| Script | Nicola Cuti |