| Issue | #267 |
| Published | February-March 1981 |
| Cover Price | 1.00 USD |
| Pages | 52 |
| Editing | Jack Harris |
| Characters | Superman; Batman; Challengers of the Unknown [Ace Morgan; Rocky Davis] |
| Genre | superhero |
| Pencils | Rich Buckler |
| Inks | Dick Giordano |
| Notes | The cover scene, where everyone on Earth is hurled upwards by a gravity bomb, never happens in the story. |
| Characters | Challengers of the Unknown [Prof Haley; Ace Morgan; Red Ryan; Rocky Davis]; Batman; Superman; Dr. Charles Brock; General Rivers; The Gravity-Masters |
| Synopsis | At the Pentagon, Superman and Batman meet generals and Challengers Ace and Prof. The Challs' secret mission to find Dr. Brock failed. He was forced to create a "gravity bomb" that could disrupt gravity all over North America while Red and Rocky were captured. Arriving in the Andes, Batman and Prof swim through tunnels. Superman and Ace fly around the hovering bomb, but are repelled by gravity waves. Superman super-makes an "energy attractor" to weaken the field and gain entry. He finds Rocky bound. Batman laser-torches inside tand finds Red. They climb acrobatically, then fiddle electronics to scuttle the Andes base. Superman gets pinned to a magnetic field. As Ace flies overhead, Superman signals by heat vision/Morse code, then bounces a flash to sever Rocky's bonds. Rocky rips out the power and Superman is free. Back at the Pentagon, Superman and Batman learn the Challs are already off on another secret mission "challenging the unknown." |
| Genre | Superhero |
| Script | Cary Burkett |
| Pencils | Rich Buckler |
| Inks | Dick Giordano |
| Colors | Gene D'Angelo |
| Letters | Ben Oda |
| Notes | Jack Kirby is credited as the creator of the Challengers. |
| Characters | Black Canary; Green Arrow; Chino; Adele King |
| Genre | superhero |
| Script | Bob Haney |
| Pencils | Trevor von Eeden |
| Inks | Vince Colletta |
| Colors | Jerry Serpe |
| Letters | John Costanza |
| Characters | Vs T. O. Morrow. |
| Genre | superhero |
| Script | J. M. deMatteis |
| Pencils | Jose Delbo |
| Inks | Kim deMulder |
| Colors | Phil Rachelson |
| Letters | Ben Oda |
| Notes | Continued next issue. |
| Characters | Vs. Lord Insectus. |
| Genre | superhero |
| Script | Bob Rozakis |
| Pencils | Alex Saviuk |
| Inks | Rodin Rodriguez |
| Colors | Bob LeRose |
| Letters | Milt Snapinn |
| Characters | Lt. Marvels; The Monster Society of Evil |
| Genre | superhero |
| Script | E. Nelson Bridwell |
| Pencils | Don Newton |
| Inks | Bob Smith |
| Colors | Adrienne Roy |
| Letters | Ben Oda |
| Notes | Conclusion to the serial. |