| Issue | #5 |
| Published | April 1980 |
| Cover Price | 0.40 |
| Pages | 36 |
| Editing | Danny Fingeroth (reprint editor) |
| Characters | X-Men [Cyclops; Angel; Marvel Girl; Beast; Iceman]; Blob [villain] |
| Genre | superhero |
| Pencils | Jack Kirby |
| Inks | Sol Brodsky |
| Reprinted | from X-Men (Marvel, 1963 series) #3 (January 1964) |
| Characters | X-Men [Cyclops; Angel; Marvel Girl; Beast; Iceman]; Professor X; Intro: The Blob [villain] |
| Genre | superhero |
| Script | Stan Lee; Jack Kirby |
| Pencils | Jack Kirby |
| Inks | Paul Reinman |
| Letters | Artie Simek |
| Editing | Stan Lee (original editor) |
| Reprinted | from X-Men (Marvel, 1963 series) #3 (January 1964) [pp. 1-12] |
| Characters | Jack O'Diamonds [villain]; Scott Summers; Professor X |
| Genre | superhero |
| Script | Roy Thomas |
| Pencils | Werner Roth |
| Inks | Herb Trimpe |
| Letters | Al Kurzrok |
| Editing | Stan Lee (original editor) |
| Notes | Origin of Cyclops concludes. |
| Reprinted | from X-Men (Marvel, 1963 series) #42 (March 1968) |