On-sale date from ad in The Flash (DC, 1959 series) #157 and copyright registration.
Inside front cover.
Story in three chapters: unnumbered chapter 1 (8.67 pages), Chapter 2 (8.67 pages), Chapter 3 (6.67 pages); Chapters 2 and 3 without leading "The" in title.
Characters added by David Marchand via the GCD Error Tracker.
On the page immediately following page 6 of the main story sequence.
On the page immediately following the two previous sequences.