| Issue | #57 |
| Published | June 1969 |
| Cover Price | 0.12 USD |
| Pages | 36 |
| Editing | Stan Lee |
| Characters | Cyclops; Marvel Girl [Jean Grey]; Angel; Iceman; Beast; Sentinel; Larry Trask |
| Genre | superhero |
| Pencils | Neal Adams |
| Inks | Tom Palmer |
| Letters | Typeset |
| Reprinted | in X-Men Classics Starring the X-Men (Marvel, 1983 series) #1 |
| Characters | FEATURE: X-Men--Cyclops; Marvel Girl [Jean Grey]; Angel; Iceman; Beast; GUESTS: Alex Summers; Lorna Dane [Polaris]; VILLAINS: Larry Trask; Judge Chalmers; Sentinels; Living Pharaoh; CAMEO FLASHBACK: Bolivar Trask |
| Synopsis | Lorna is attacked by a Sentinel; Alex is paralyzed by his terrible and destructive new powers as the X-Men try to figure out how to help him; The Egyptian authorities arrive and the Living Pharaoh tells them to arrest the X-Men for the destruction of an ancient temple; Alex takes off in the conflict and is attacked by a Sentinel; Learning of the attack on Lorna, Iceman and Beast head back to the states to investigate; They catch a newscast where the son of Bolivar Trask proclaims to the world that the Sentinels are once again active and hunting for mutants. |
| Genre | superhero |
| Script | Roy Thomas |
| Pencils | Neal Adams |
| Inks | Tom Palmer |
| Colors | Neal Adams |
| Letters | Sam Rosen |
| Reprinted | in Giant-Size X-Men (Marvel, 1975 series) #2; in X-Men Classics Starring the X-Men (Marvel, 1983 series) #1 |
| Characters | Marvel Girl |
| Synopsis | explanation of Marvel Girl's powers |
| Genre | superhero |
| Script | Linda Fite |
| Pencils | Werner Roth |
| Inks | Sam Grainger |
| Letters | Sam Grainger |
| Reprinted | in Cat, The (Marvel, 1972 series) #4 (June 1973); in Giant-Size X-Men (Marvel, 1975 series) #1 (1975); in Marvel Milestone Edition: Giant-Size X-Men #1 (Marvel, 1991 series) #nn; in Women of Marvel: Celebrating Seven Decades Omnibus (Marvel, 2010 series) #[nn]; in Marvel Special (Marvel Italia, 1994 series) #14 |