| Issue | #324 |
| Published | September 1964 |
| Frequency | Monthly |
| Cover Price | 0.12 USD |
| Pages | 36 |
| Editing | Mort Weisinger |
| Characters | Superboy; Heroes of Lallor [Beast Boy; Evolvo Lad; Gas Girl] |
| Genre | superhero |
| Pencils | Curt Swan |
| Inks | Sheldon Moldoff |
| Letters | Ira Schnapp |
| Reprinted | in Legion of Super-Heroes Archives, The (DC, 1991 series) #3; in Showcase Presents (DC, 2007 series) #2 |
| Characters | Heroes of Lallor [Beast Boy; Gas Girl; Evolvo Lad; Duplicate Boy; Life Lass]; Legion of Super-Heroes [Superboy; Shrinking Violet; Star Boy; Saturn Girl; Sun Boy; Chameleon Boy; Invisible Kid; Mon-El;]; Marden King |
| Synopsis | An evil scientist tricks the Heroes of Lallor into fighting the Legion. |
| Genre | superhero |
| Script | Edmond Hamilton |
| Pencils | John Forte |
| Inks | John Forte |
| Letters | Vivian Berg ? |
| Notes | Marden King is the brother of Jungle King (also known as Monster Master) whom the Legion fought in Adventure Comics (DC, 1938 series) #309. |
| Reprinted | in DC 100-Page Super Spectacular (DC, 1971 series) #DC-8; in Batman (DC, 1940 series) #238; in Best of DC, The (1979 series) #57; in Legion of Super-Heroes Archives, The (DC, 1991 series) #3; in Showcase Presents: Legion of Super-Heroes (DC, 2007 series) #2 |
| Synopsis | Credit for suggesting the Heroes of Lallor in previous issues by various readers: Beast Boy suggested by reader Thomas Raimondo; Gas Girl suggested by reader Charlie Hendrix; Evolvo Lad suggested by reader Mark Wade; Duplicate Boy suggested by reader Steven Cohen; Life Lass suggested by reader Eric Heidman. |
| Letters | typeset |
| Characters | Heroes of Lallor [Beast Boy; Gas Girl; Evolvo Lad; Duplicate Boy; Life Lass]; Legion of Super-Heroes [Superboy; Shrinking Violet; Star Boy; Saturn Girl; Sun Boy; Chameleon Boy; Invisible Kid; Colossal Boy; Ultra Boy; Mon-El; Element Lad; Cosmic Boy; Lightning Lad]; Marden King |
| Synopsis | The Heroes of Lallor turn on Marden King as they realise that they have been duped. |
| Script | Edmond Hamilton |
| Pencils | John Forte |
| Inks | John Forte |
| Letters | Vivian Berg ? |
| Reprinted | in DC 100-Page Super Spectacular (DC, 1971 series) #DC-8; in Batman (DC, 1940 series) #238; in Best of DC, The (1979 series) #57; in Legion of Super-Heroes Archives, The (DC, 1991 series) #3; in Showcase Presents: Legion of Super-Heroes (DC, 2007 series) #2 |
| Letters | typeset |
| Notes | It is revealed in this column that Polar Boy is the youngest of all the members of either the Legion proper or the Substitute Heroes. |
| Characters | Superboy |
| Genre | superhero |
| Script | Otto Binder |
| Pencils | Al Plastino |
| Inks | Al Plastino |
| Reprinted | from Superboy (DC, 1949 series) #67 |
| Characters | Jerry the Jitterbug |
| Synopsis | Jerry's mad because Helen broke up with him. |
| Genre | gag |
| Script | Henry Boltinoff |
| Pencils | Henry Boltinoff |
| Inks | Henry Boltinoff |
| Letters | Henry Boltinoff |