| Issue | #240 |
| Published | June 1978 |
| Frequency | monthly |
| Cover Price | 0.60 USD |
| Pages | 52 |
| Editing | Al Milgrom |
| Characters | Legion of Super-Heroes [Superboy; Phantom Girl; Colossal Boy; Cosmic Boy; Sun Boy]; Grimbor |
| Genre | superhero |
| Pencils | Mike Grell (signed) |
| Inks | Joe Rubinstein (signed) |
| Characters | Legion of Super-Heroes [Superboy; Colossal Boy; Cosmic Boy; Phantom Girl; Sun Boy]; Grimbor; Zall Morgan; Charma (flashback); President Kandru |
| Synopsis | Grimbor wants revenge on the Legion after the death of Charma in prison. |
| Genre | superhero |
| Script | Paul Levitz (plot); Jack C. Harris (dialogue) |
| Pencils | Howard Chaykin (layouts) |
| Inks | Bob Wiacek (finishes) |
| Colors | Cory Adams |
| Letters | Shelly Leferman |
| Characters | Aquaman; Aqualad |
| Synopsis | Aquaman saves a miniature research submarine from a tidal wave. Once safely on land, the scientists aboard the sub celebrate their rescue by sharing Hostess Twinkies with Aquaman and Aqualad, but not with the dolphins who did all of the heavy lifting! |
| Genre | superhero |
| Pencils | Curt Swan |
| Inks | Vince Colletta |
| Notes | Hostess Twinkies ad |
| Characters | Legion of Super-Heroes [Wildfire]; Legion Academey [Dawnstar; Jed Rikane (first appearance); Laurel Kent; Shadow Lad]; R.J. Brande (flashback) |
| Synopsis | While still a student at the Legion Academy, Dawnstar recounts her origin and learns teamwork when she tries to round up two escaped creatures by herself. |
| Genre | superhero |
| Script | Paul Levitz (plot); Paul Kupperberg (writer) |
| Pencils | James Sherman |
| Inks | Bob McLeod |
| Colors | Adrienne Roy |
| Letters | Shelly Leferman |
| Notes | In this story, Shadow Lad's real name is not revealed and is referred to as Shadow Lass' younger brother. |
| Reprinted | in Best of DC, The (DC, 1979 series) #33 |
| Script | Jay L. Zilber |
| Letters | typeset |
| Notes | bios of other 30th Century heroes outside the Legion |