| Unofficial Action Comics Index |
Credits:
| Story | Otto Binder |
| Pencils | Curt Swan |
| Inks | John Forte |
| Editing | Mort Weisinger |
Feature Character(s):
- Superman (last in Superman's Pal Jimmy Olsen #45/3; next in the second story in this issue)
Guest Star(s):
- Supergirl (last in Superman's Pal Jimmy Olsen #45; next in the second story in this issue)
Supporting Character(s):
- Lois Lane (last in Superman's Pal Jimmy Olsen #45/3; next in Superman Vol. 1 #138)
Other Character(s):
- Professor Heath (first appearance)
- a Professor Heath robot (first appearance)
- hospitalized children (first appearance for all)
- a Clark Kent robot (destroyed)
- Hyper-Man of Zoron (Chester King; first appearance; dies)
- Lydia Long of Oceania (first appearance)
- citizens of Oceania (first appearance for all)
- a Hyper-Man robot (first appearance)
Location(s):
- Space Sector 2814
- Earth
- Arctic Circle
- United States of America
- Earth
- Unidentified Space Sector(s)
Story Reprinted in:
- Superman Vol. 1 #207 (June 1968)
- Showcase Presents Superman #2 (2006)
Credits:
| Story | Jerry Siegel |
| Art | Jim Mooney |
| Editing | Mort Weisinger |
Feature Character(s):
- Supergirl (temporarily loses her memory due to red kryptonite particles in a comet; takes the identity "Gloria Smith;" last in the first story in this issue; next in Superman's Pal Jimmy Olsen #46)
Guest Star(s):
- Superman (last in the first story in this issue; next in Brave and the Bold #30)
Villain(s):
- a robot warrior from another world (first appearance)
- a gang of bank robbers (first appearance of all; Duke and Max named)
Other Character(s):
- Mary Jane (first appearance; a young girl at Midvale Orphanage)
- Professor Ralph Evans (first appearance; a scientist)
- Ellen Evans (first appearance; his wife and coworker)
- a Linda Lee robot
- citizens of Metropolis
- citizens of Smallville
Location(s):
- Arctic Circle
- United States of America
Story Reprinted in:
- Supergirl Archives #1 (2001)
- Showcase Presents: Supergirl #1 ([November] 2007)
- Supergirl: The Silver Age Omnibus #1 ([June] 2016)
- Supergirl: The Silver Age Vol. 1 (2017)