| Issue | #28 |
| Published | January 1967 |
| Cover Price | 0.12 |
| Pages | 36 |
| Editing | Stan Lee |
| Notes | Disputed penciler credit--Werner Roth alone per Steve Whitaker, Nick Caputo, Carl Gafford, and Michael Evans; Werner Roth with Jack Kirby per the original indexer. |
| Characters | The X-Men (Cyclops, Marvel Girl, Beast, Iceman) and Mimic vs. Banshee |
| Genre | superhero |
| Pencils | Werner Roth |
| Inks | John Tartaglione |
| Notes | Disputed penciler credit--Werner Roth alone per Steve Whitaker, Nick Caputo, Carl Gafford, and Michael Evans; Werner Roth with Jack Kirby per the original indexer. |
| Reprinted | in Marvel Milestone Edition: X-Men #28 (Marvel, 1994 series) #nn |
| Characters | F: X-Men--Professor X, Cyclops, Marvel Girl, Beast, Iceman, Mimic; I: The Banshee (Sean Cassidy); V: Ogre (I), Factor Three (I); GA: Ted Roberts |
| Genre | superhero |
| Script | Roy Thomas |
| Pencils | Werner Roth |
| Inks | Dick Ayers |
| Letters | Artie Simek (pages 1-7), Sam Rosen (uncredited, pages 8-20) |
| Notes | Lettering credits provided by Rodrigo Baeza |
| Reprinted | in X-Men (Marvel, 1963 series) #76; in Marvel Milestone Edition: X-Men #28 (Marvel, 1994 series) #nn; in Marvel Special (Marvel Italia, 1994 series) #12 |