| Issue | #171 |
| Published | November 1967 |
| Cover Price | 0.12 USD |
| Pages | 36 |
| Editing | Mort Weisinger; E. Nelson Bridwell (Asst) |
| Characters | Superman; Batman |
| Genre | superhero |
| Pencils | Curt Swan |
| Inks | George Klein |
| Characters | Superman; Batman; Robin; Swifty Sloane; Perry White; Lois Lane; Alfred; Mark Dolan; Chauncey Belmont; Victor Stark |
| Genre | superhero |
| Script | Leo Dorfman |
| Pencils | Curt Swan |
| Inks | George Klein |
| Reprinted | in Supermann (Williams Forlag A/S, 1969 series) #11/1970 |
| Characters | Superman [Clark Kent]; Superboy [Clark Kent] (flashback); Silk Smith (Villain); Professor Stanley Halley (Intro); Smallville Mayor Perkins; Lois Lane (Cameo); Jimmy Olsen (Cameo); Jonathan Kent (Flashback); Mel Evans (Flashback); Lana Lang (Flashback); Kryptonite |
| Synopsis | The story of how the world discovered the effect that Kryptonite has on Superman. |
| Genre | superhero |
| Script | Jerry Coleman |
| Pencils | Al Plastino |
| Inks | Al Plastino |
| Reprinted | from Superman (DC, 1939 series) #136 (April 1960) |