| Issue | #21 |
| Published | March 1985 |
| Cover Price | 0.60 |
| Pages | 36 |
| Editing | Mike Carlin |
| Genre | superhero |
| Pencils | Ron Wilson |
| Inks | Joe Sinnott |
| Characters | The Thing, Tarianna, O'Houlihan, Llrrllllnnllyyrrl, Ultron |
| Synopsis | The Thing battles a duplicate Ben Grimm on The Secret Wars Planet. |
| Genre | superhero |
| Script | John Byrne |
| Pencils | Ron Wilson |
| Inks | Joe Sinnott |
| Colors | Bob Sharen |
| Letters | Rick Parker |