52-page Giant. Cover pencils by Marie Severin, inks by Joe Sinnott. The Origin of Professor X, script by Stan Lee, pencils by Jack Kirby and Alex Toth, inks by Vince Colletta; 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; reprinted from issue 12. Where Walks the Juggernaut, script by Stan Lee, pencils by Jack Kirby and Werner Roth, inks by Joe Sinnott; reprinted from issue 13. 52 pgs. $0.25. Cover price $0.25.