| Issue | #37 |
| Published | February 1989 |
| Cover Price | 1.50 USD; 1.85 CAD |
| Pages | 52 |
| Editing | Mark Waid |
| Characters | Legion of Substitute Heroes [Chlorophyll Kid; Fire Lad; Night Girl; Polar Boy; Stone Boy]; Dr. Light [Arthur Light] |
| Genre | Superhero |
| Script | Ty Templeton |
| Pencils | Ty Templeton (signed) |
| Inks | Ty Templeton (signed) |
| Letters | Ty Templeton |
| Characters | Legion of Substitute Heroes [Chlorophyll Kid [Ral Benem]; Fire Lad; Night Girl; Polar Boy [Brek Bannin]; Stone Boy]; Legion of Super-Heroes [Bouncing Boy; Chameleon Boy; Cosmic Boy; Saturn Girl; Sun Boy; Ultra Boy]; Mr. Benem; Mrs. Benem; Estimate Boy; the Tree-Men (villains) |
| Synopsis | The origin of the Legion of Substitute Heroes. |
| Genre | Superhero |
| Script | Ty Templeton |
| Pencils | Ty Templeton |
| Inks | Anthony van Bruggen |
| Colors | Carl Gafford |
| Letters | Ty Templeton |
| Notes | Adapted (with a humorous slant) from the original in Adventure Comics (1935 series) #306. |
| Characters | Dr. Light I [Jacob Finlay] (origin); Dr. Light II [Arthur Light] (origin); Lester; Mr. B (dies) |
| Synopsis | Jacob Finlay, the original Dr. Light, continues to haunt Arthur Light, the second Dr. Light. |
| Genre | Superhero |
| Script | Craig Boldman |
| Pencils | Mike Parobeck |
| Inks | Ken Branch |
| Colors | Tom Ziuko |
| Letters | Tim Harkins |
| Script | Mark Waid |
| Pencils | Tom Grindberg |
| Inks | Dick Giordano |
| Letters | typeset |
| Notes | Mark Waid discusses secrets behind the origins of the Legion of Substitute Heroes and Doctor Light. Letters from readers - Jody Hamby, Jim Kelly, James E. Helsel, Gary Hellen and Kip Talbott - and responses from Mark Waid. Preview of cover to SECRET ORIGINS #38. |