Enter The Headmen #21
| Series | The Defenders |
| Number | Vol. 1 #21 |
| Publisher | Marvel Comics |
| Date | 1975-03 |
| Type | Comic Book, Softcover |
| Language | English |
| Artist | Sal Buscema |
| Colorist | George Roussos |
| Editor | Roy Thomas |
| Inker | Sal Trapani |
| Letterer | John Costanza |
| Writer | Steve Gerber |
| Genre | Superhero |
| Published in | New York, NY |
| Characters | Doctor Strange, Incredible Hulk, Valkyrie, Nighthawk, Clea |
Added by arbakol