| Issue | #398 |
| Published | October 1970 |
| Cover Price | 0.15 |
| Pages | 36 |
| Editing | Mike Sekowsky |
| Characters | Supergirl; fake Superman, Krypto, Streaky, and Comet |
| Genre | superhero |
| Pencils | Dick Giordano |
| Inks | Dick Giordano |
| Characters | Supergirl; Superman; Dick Malverne; Edna Danvers; Mr. Mxyzptlk; Mon-El and Brainiac 5 (flashback); the bottle city of Kandor |
| Genre | superhero |
| Script | Leo Dorfman |
| Pencils | Jim Mooney |
| Inks | Jim Mooney |
| Reprinted | from Action Comics #306 (11/1963) |
| Genre | superhero |
| Script | Mike Sekowsky |
| Pencils | Mike Sekowsky |
| Inks | Dick Giordano |
| Notes | new costume ideas from readers |
| Characters | Supergirl |
| Genre | superhero |
| Script | Mike Sekowsky |
| Pencils | Mike Sekowsky |
| Inks | Mike Peppe?? |
| Letters | John Costanza |
| Genre | superhero |
| Script | Mike Sekowsky |
| Pencils | Mike Sekowsky |
| Inks | Dick Giordano |
| Notes | more new costume ideas and preview of next issue |