X-Men #123 "Listen -- Stop Me if You've Heard It -- But This One Will Kill You!" Release date: April 17, 1979 Cover date: July, 1979

At Xavier's School for Gifted Youngsters in Westchester County, New York, Professor Charles Xavier summons his students telepathically. When the Beast, Angel, Iceman, and Cyclops arrive, he puts them through a series of exercises to hone their mutant talents.

The series was preceded by The X-Men vol. 1 (renamed The Uncanny X-Men in 1978) and X-Men: Legacy (initially known as X-Men vol. 2) from 1991 to 2001, New X-Men from 2001 to 2004 and again X-Men from 2004 to 2008).

NOTE: Professor Xavier claims that he lost the use of his legs in a childhood accident. It is later revealed in X-Men #9, that he actually was disabled while fighting Lucifer.

These are cover-to-cover scans of Uncanny X-Men vol. 1. They are taken from the 40 Years of X-Men DVD-ROMs produced by the company Graphic Imaging Technology in 2005. They used digital copies for the covers of the first eight issues, so for consistency I have replaced those with scanned images found on the web to keep it non-digital throughout.

Iceman plays a prank on Beast and freezes his arm. Angel has to pull the two off each other and Professor X begins their training lessons using his "training machine". The Beast is first and is given timed lessons to help him with his agility skills. He first grabs a taut wire with his toes in a second and a half.

In this colossal collector’s dream, the first 21 X-Men stories from 1963–1966 have been meticulously reproduced from the most pristine copies of these rare comic books— the fourth volume from TASCHEN’s Eisner Award-winning Marvel Comics Library series.