| Issue | #403 |
| Published | March 1971 |
| Cover Price | 0.25 USD |
| Pages | 68 |
| Editing | E. Nelson Bridwell |
| Notes | Also numbered as DC Giant G-81. |
| Characters | Mon-El; Sun Boy; Lightning Lass; Chameleon Boy; Saturn Girl; Superboy; Lightning Lad |
| Genre | superhero |
| Pencils | Curt Swan |
| Inks | Murphy Anderson |
| Reprinted | in Legion of Super-Heroes Archives, The (DC, 1991 series) #10; in Showcase Presents: Legion of Super-Heroes (DC, 2007 series) #4 |
| Characters | Saturn Girl; Cosmic Boy; Triplicate Girl; Invisible Kid; Colossal Boy; Brainiac 5; Matter-Eater Lad; Lightning Lad; Ultra-Boy; Shrinking Violet; Sun Boy; Mon-El; Superboy; Supergirl; Lori Lemaris |
| Synopsis | Saturn Girl tries to sacrifice herself as the Legionnaire predicted to die fighting Zaryan, but Lightning Lad dies instead. |
| Genre | superhero |
| Script | Jerry Siegel |
| Pencils | John Forte |
| Inks | John Forte |
| Letters | Joe Letterese |
| Notes | Death of Lightning Lad. Lori Lemaris app. Saturn Girl elected Legion leader. |
| Reprinted | from Adventure Comics (DC, 1938 series) #304 |
| Characters | Saturn Girl; Cosmic Boy; Sun Boy; Invisible Kid; Bouncing Boy; Shrinking Violet; Colossal Boy; Brainiac 5; Mon-El (as Marvel Lad, the Legionnaire Lemon); Superboy (in flashback); Phantom Zone criminals |
| Synopsis | Mon-El finally leaves the Phantom Zone and joins the Legion full-time. |
| Genre | superhero |
| Script | Jerry Siegel |
| Pencils | John Forte |
| Inks | John Forte |
| Letters | Joe Letterese |
| Notes | Lightning Lad app.; "Super-Monsters" app; Mon-El leaves Phantom Zone permanently |
| Reprinted | from Adventure Comics (DC, 1938 series) #305 (February 1963) |
| Characters | Sun Boy; Cosmic Boy; Saturn Girl; Mon-El; Bouncing Boy; Lightning Lass (as Lightning Lad); Chameleon Boy; Brainiac 5; Proty |
| Synopsis | Lightning Lad's sister impersonates her dead brother and later joins the Legion. |
| Genre | superhero |
| Script | Edmond Hamilton |
| Pencils | John Forte |
| Inks | John Forte |
| Letters | Joe Letterese |
| Notes | Intro Proty, Lightning Lass; Lightning Beasts of Korball app; Lightning Lad's body app. |
| Reprinted | from Adventure Comics (DC, 1938 series) #308 (May 1963) |
| Characters | Saturn Girl; Duo Damsel; Phantom Girl; Light Lass; Shrinking Violet; Cosmic Boy; Karate Kid; Ultra Boy; Princess Projectra; Shadow Lass; Lightning Lad; Night Girl; Chlorophyll Kid |
| Genre | superhero |
| Script | E. Nelson Bridwell |
| Pencils | Ross Andru |
| Inks | Mike Esposito |
| Notes | Renderings of costume designs submitted by fans. |
| Reprinted | in Legion of Super-Heroes Archives, The (DC, 1991 series) #10; in Showcase Presents: Legion of Super-Heroes (DC, 2007 series) #4 |
| Characters | Ferro Lad (statue); Superboy (statue) |
| Genre | superhero |
| Script | E. Nelson Bridwell |
| Pencils | Ross Andru |
| Inks | Mike Esposito |
| Reprinted | in Limited Collectors' Edition (DC, 1972 series) #C-49; in Legion of Super-Heroes Archives, The (DC, 1991 series) #10; in Showcase Presents: Legion of Super-Heroes (DC, 2007 series) #4 |
| Characters | Superboy; Mon-El; Saturn Girl; Sun Boy; Lightning Lass; Chameleon Boy; Proty |
| Synopsis | The Legionnaires try to find a way to revive Lightning Lad |
| Genre | superhero |
| Script | Edmond Hamilton |
| Pencils | John Forte |
| Inks | John Forte |
| Letters | Milton Snapinn |
| Reprinted | from Adventure Comics (DC, 1938 series) #312 (September 1963) |
| Characters | Superboy; Mon-El; Saturn Girl; Sun Boy; Lightning Lass; Chameleon Boy; Proty (dies); Lightning Lad (restored) |
| Synopsis | Proty sacrifices his life to revive Lightning Lad. |
| Genre | superhero |
| Script | Edmond Hamilton |
| Pencils | John Forte |
| Inks | John Forte |
| Letters | Milton Snapinn |
| Notes | Proty dies; Lightning Lad revived |
| Reprinted | from Adventure Comics (DC, 1938 series) #312 (September 1963) |