Editor Julius Schwartz's pay records have Bob Kane on pencils. However, it is known that Bob Kane contracted the artwork out to Sheldon Moldoff.
Story in 2 parts: unnumbered part 1 (7.67 pages) and Part 2 (3.67 pages; same title as part 1 but without exclamation point).
On the page immediately following page 8 of the previous story sequence.
Information on the planet Pluto.
Letters of comment from Mike Friedrich (future comics writer), Stephen Mahinka, Mickey Gaither and Mary Royeton.
Editor Julius Schwartz's pay records have Bob Kane on pencils. However, it is known that Bob Kane contracted the artwork out to Sheldon Moldoff.
This story is continued in part from the second story of Batman #165.
A caption at the end of the story indicates that a follow-up to this story was planned, but was never published.