Story: "Those Who Will Not Learn the Lessons of History..." (22 Pages)

Credits:

Paul Levitz (plot, script)
Keith Giffen (pencils)
Ernie Colon and Bob Smith (inks)
John Costanza (letters)
Carl Gafford (colors)
Karen Berger (edits)

Feature Character: Cosmic Boy (also in flashback between Legends #2 and main story, and in flashback in between Legion of Super-Heroes Vol. 3 #23 and Legends #1)

Supporting Characters:

Night Girl (last in Legion of Super-Heroes Vol. 3 #23; also in flashback in between Legion of Super-Heroes Vol. 3 #23 and main story)
Gwyneth Tate (last in Legends #2; next in Blue Beetle Vol. 2 #9)

Villains:

Time Trapper (behind the scenes)
G. Gordon Godfrey
Darkseid (behind the scenes)

Guest Appearances: Element Lad (in flashback in between Legion of Super-Heroes Vol. 3 #23 and #24)
Shvaughn Erin (in flashback in between Legion of Super-Heroes Vol. 3 #21 and #25)
Superman (in flashback in between Legends #2 and #3)

Other Characters:

Jason Krinnski (behind the scenes)
Roger (a NASA research scientist)
Tommy (a helicopter pilot; first appearance for both)

Comments: This issue is bannered Legends Spin-Off Chapter 4.