CATALOG RECORD

The X-Men #12

Marvel · Series began 1963 · July 1965

first appearance of Juggernaut

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WHY COLLECTORS WANT IT

Juggernaut (Cain Marko) — first appearance, also in flashback, origin in flashback
Kurt Marko (Marvel) — first appearance, flashback, death
Sharon Xavier (Marvel) — first appearance, flashback, death

Dates

Cover date: July 1965
On sale: May 4, 1965
Pages: 36

Editions and covers

Original edition
Source ↗

Creators

pencils: Jack Kirby, Alex Tothinks: Frank Giacoia, Vince Colletta, Chic Stone, Paul Reinmanletters: Sam Rosenscript: Stan Lee

Stories

The Origin of Professor X! · 20 pages
Cerebro detects a powerful mutant and Xavier fears that he knows who it is. The X-Men prepare the mansion for an all-out assault. As the mysterious villain batters his way through the mansion's defenses, Professor X tells his students his origin story and how his step-brother changed from tormenting bully to an unstoppable Juggernaut.

Characters

Scott SummersCyclopsHank McCoyBeastJean GreyBobby DrakeIcemanWarren Worthington IIICharles XavierProfessor XMarvel GirlAngelCain MarkoJuggernautKurt MarkoSharon Xavier

Reprinted in

Fantastic! (1967), Essential Uncanny X-Men (1999), Marvel Masterworks: The X-Men (2003), The Super-Heroes (1975), X-Men (1984), The Marvel Saga the Official History of the Marvel Universe (1985), Marvel Masterworks (1987), X-Men: The Early Years (1994), Marvel Masterworks: The X-Men (2009), The X-Men Omnibus (2009), X-Men Epic Collection (2014), X-Men: Children of the Atom (2019), Mighty Marvel Masterworks: The X-Men (2021), Marvel: May 1965 Omnibus (2025)