| Issue | #81 |
| Published | June-July 1977 |
| Frequency | bi-monthly |
| Cover Price | 0.35 USD |
| Pages | 36 |
| Editing | Jack C. Harris |
| Characters | Challengers of the Unknown [Red Ryan; Ace Morgan; Prof Haley; Rocky Davis; June Robbins]; Multi-Man |
| Genre | adventure |
| Pencils | Michael Netzer [as Mike Nasser] (signed) |
| Inks | Neal Adams (signed) |
| Characters | Challengers of the Unknown [Prof Haley; Red Ryan; Rocky Davis; Ace Morgan; June Robbins]; Multi-Man; Gaylord Clayborne; Dr. Heathcliff Monroe; Susan Charness (appears to die in this story); M'nagala |
| Synopsis | The Challengers race against time to stop Multi Man and save June from his clutches. |
| Genre | adventure |
| Script | Gerry Conway |
| Pencils | Michael Netzer [as Mike Nasser] |
| Inks | Bob Wiacek |
| Notes | Story continues from Super-Team Family (DC, 1975 series) #10. |