| Issue | #16 |
| Published | April 2003 |
| Cover Price | 2.25 USD |
| Pages | 36 |
| Editing | Stephen Wacker |
| Characters | Martian Manhunter; Green Lantern [John Stewart]; Hawkgirl; Batman; Superman; Wonder Woman; Flash [Wally West] |
| Genre | superhero |
| Pencils | Butch Lukic (painted) |
| Inks | Butch Lukic (painted) |
| Colors | Butch Lukic (painted) |
| Characters | Batman; Wonder Woman; Flash [Wally West]; Hawkgirl; Green Lantern [John Stewart]; Superman; Martian Manhunter |
| Synopsis | The Martian Manhunter must discover which member of the Justice League has been replaced with an imposter. |
| Genre | superhero |
| Script | Scott McCloud |
| Pencils | John Delaney |
| Inks | John K. Snyder III |
| Colors | Heroic Age (Separations); John Kalisz |
| Letters | Bill Oakley |
| Reprinted | In Justice League Adventures, Vol. 2: Friends and Foes (DC, 2004 series) #nn |