Part one of the story of the Incredible Hulk’s encounter with Psyklops, originally published in manuscript form as “The Hulk In The Grip of Psyklop” in Marvelmania Magazine #4. The story is concluded in Incredible Hulk #140.
The plot is described in “The Mighty Marvel Checklist” in the following way:
A monster from beyond time and space — the final caging of the Hulk — and the eeriest war-of-the-worlds this side of H.P. Lovecraft! Like weird!
The credits do an excellent job of explaining the roles of the writers and artists in this issue:
Story By: Harlan Ellison (That Means: He Conceived The Plot!)
Adaptation By: Roy Thomas (That Means: He Wrote The Dialogue!)
Art By: Sal Buscema (That Means: He Drew The Thing!)
Story Continued in Incredible Hulk #140