- Script:
- Arnold Drake
- Pencils:
- Don Heck (breakdowns); Werner Roth
- Inks:
- John Tartaglione
- Colors:
- ?
- Letters:
- Sam Rosen
- Genre:
- superhero
- Characters:
- The X-Men [Angel; Beast; Cyclops; Iceman; Marvel Girl]; Lorna Dane; Mesmero (Villain); Demi-Men (Villain; many Death); Magneto Robot (Villain); Erik the Red (Villain)
- Reprints: show reprint note before migration
Sources for particularization of Heck pencils credit are The Official Marvel Index to the X-Men (Olshevsky 1987), The Official Marvel Index to the X-Men (Ward 1994), and Official Index to the Marvel Universe (Vandal et al. 2009).
- Script:
- Arnold Drake
- Pencils:
- Werner Roth
- Inks:
- John Verpoorten
- Colors:
- ?
- Letters:
- Sam Rosen
- Genre:
- Superhero
- Characters:
- Beast (origin continued); Hank McCoy (as teenager); Professor X; X-Men [Cyclops; Iceman; Angel]; Norton McCoy; Edna McCoy; El Conquistador (Villain)
- Reprints: show reprint note before migration
The Origins of the Uncanny X-Men! part 15, origin of the Beast part 4, pages 1 and 2 of this story is not reprinted in the Amazing Adventures #17 and X-Men: Mutations #nn reprints. First appearance of Cerebro.