- Script
- Louise Simonson (credited)
- Pencils
- Walter Simonson (credited as Walt Simonson)
- Inks
- Bob Wiacek (credited)
- Colors
- Petra Goldberg (credited as Petra Scotese)
- Letters
- Joe Rosen (credited)
- First Line of Dialogue or Text
- For years, the alley has sheltered the Morlocks,
- Genre
- superhero
- Characters
- Marauders: Arclight [Philippa Sontag] (cameo flashback); Blockbuster (cameo flashback); Harpoon (cameo flashback); Scalphunter [John Greycrow] (cameo flashback)
Morlocks: Ape (guest); Berzerker (villain, introduction); Blow-Hard (villain, introduction, death); Caliban (guest); Erg (guest); Leech (guest); Masque (villain); Scaleface (villain, introduction, death); Tar Baby (guest)
Morlocks: Ape (guest); Berzerker (villain, introduction); Blow-Hard (villain, introduction, death); Caliban (guest); Erg (guest); Leech (guest); Masque (villain); Scaleface (villain, introduction, death); Tar Baby (guest)
Power Pack: Counterweight [Jack Power] (cameo flashback); Destroyer [Alex Power] (cameo flashback); Molecula, Mistress of Density [Julie Power] (cameo flashback)
X-Factor: Angel [Warren Worthington III]; Beast [Hank McCoy]; Cyclops [Scott Summers]; Iceman [Bobby Drake]; Marvel Girl [Jean Grey]
Apocalypse [En Sabah Nur] (villain); Boom-Boom [Tabitha Smith] (guest); Cameron Hodge (guest); Abraham Kieros (introduction, becomes War); Artie Maddicks; Skids [Sally Blevins]; Thor [Sigurd Jarlson] (cameo flashback); Trish Tilby (TV screen); Vanisher [Telford Porter] (villain); Savage Wolf Gang (villain); Joe; Bob; Fran; Doctor James
- Universe
- Marvel : mainstream
- Synopsis
- X-Factor tries to save a group of untrusting Morlocks from the Marauders, but the group leaves their rescuers and runs up against the police instead. Boom Boom quits stealing for the Vanisher. Doctors tell Cyclops and Jean that Angel's wings will have to be amputated.
- Reprints
- Keywords
- Mutant Massacre
Continued from Power Pack (Marvel, 1984 series) #28 and Thor (Marvel, 1966 series) #374.