A rare plague which turns its victims purple is spreading like wildfire. A scientist tips Clark off to a similar plague in the past, but when they try to research it, they find an older gentleman has been reading that book frequently as of late. The older gentleman is the Ultra-Humanite, and it’s up to Superman to make sure the scientist seeking a cure reaches his goal before Ultra finishes the job.
| Barcode | N/A |
|---|---|
| Character | Superman (Kal-El / Clark Kent), Ultra-Humanite (Dolores Winters) |
| Cover Date | December 1939 |
| Issue | 19 |
| Rating | N/A |
| Artist | Homer Fleming, Bert Christman, Bernard Baily, Fred Guardineer, Bob Kane |
| Colorist | N/A |
| Cover Artist | Joe Shuster |
| Cover Colorist | N/A |
| Cover Inker | N/A |
| Cover Painter | N/A |
| Cover Penciller | N/A |
| Cover Separator | N/A |
| Editor | Vincent Sullivan |
| Editor in Chief | Vincent Sullivan |
| Inker | Paul Cassidy |
| Layouts | N/A |
| Letterer | Bernard Baily |
| Painter | N/A |
| Penciller | Joe Shuster |
| Plotter | N/A |
| Scripter | N/A |
| Separator | N/A |
| Translator | N/A |
| Writer | Jerry Siegel, Gardner Fox, Bill Finger, Ken Fitch |
