| Issue | #51 |
| Published | May 1987 |
| Cover Price | .75 |
| Pages | 36 |
| Editing | Ann Nocenti (editor); Jim Shooter (editor-in-chief) |
| Characters | Binary, Cannonball, Magma. |
| Genre | superhero |
| Pencils | Kevin Nowlan |
| Inks | Kevin Nowlan |
| Characters | Professor X, Magneto, Cannonball, Cypher, Karma, Magik, Magma, Mirage, Sunspot, Warlock, Wolfsbane; GS: Storm; GA: Starjammers (Binary, Ch'od, Corsair, Cr'reee, Hepzibah, Raza, Sikorsky), Lilandra, Emma Frost, Selene, Sebastian Shaw, Tessa. |
| Synopsis | Professor X learns the details of the Mutant Massacre, and that his original students have betrayed his dream; after wrestling with competing loyalties, he sends the New Mutants home; meanwhile, Magneto and Storm make an alliance with the Hellfire Club. |
| Genre | superhero |
| Script | Chris Claremont |
| Pencils | Kevin Nowlan |
| Inks | Kevin Nowlan |
| Colors | Glynis Oliver |
| Letters | Tom Orzechowski |
| Notes | Professor X appears next in Excalibur #17. |