| Issue | #33 |
| Published | May 1989 |
| Cover Price | 1.25 USD; 1.75 CAD |
| Pages | 36 |
| Editing | Bob Harras; Daryl Edelman (assistant editor); Roger Stern (original material) |
| Characters | X-Men [Cyclops; Wolverine] |
| Genre | Superhero |
| Pencils | Steve Lightle |
| Inks | Steve Lightle |
| Characters | Proteus |
| Genre | Superhero |
| Pencils | Steve Lightle |
| Inks | Steve Lightle |
| Characters | FEATURE: X-Men--Cyclops; Phoenix [Jean Grey]; Storm; Wolverine; Colossus; Banshee; Nightcrawler; GUESTS: Moira MacTaggert; Joe MacTaggert (Death); Havok; Polaris; VILLAIN: Proteus |
| Synopsis | Cyclops pulls the team together after their first mind numbing encounter with Proteus; Proteus takes over the body of his father in order to take the X-Men down in round two. |
| Genre | Superhero |
| Script | Chris Claremont; John Byrne (co-plotter) |
| Pencils | John Byrne |
| Inks | Terry Austin |
| Colors | Glynis Oliver |
| Letters | Tom Orzechowski |
| Reprinted | from X-Men (Marvel, 1963 series) #127 |
| Characters | Havok; Polaris |
| Genre | Superhero |
| Script | Ann Nocenti |
| Pencils | John Bolton |
| Inks | John Bolton |
| Colors | Glynis Oliver |
| Letters | Joe Rosen |
| Characters | Cyclops; Storm; Wolverine; Nightcrawler; Proteus |
| Genre | Superhero |
| Pencils | John Byrne |
| Inks | Terry Austin |
| Letters | Dan Crespi |
| Reprinted | from X-Men (Marvel, 1963 series) #127 |
| Characters | Havok; Polaris |
| Genre | Superhero |
| Pencils | John Bolton |
| Inks | John Bolton |
| Notes | Back Cover |