Story: "The Secret Origin of Firestorm, The Nuclear Man" (22 Pages)

Credits:

Gerry Conway (plot, script)
George Tuska (pencils)
Pablo Marcos (inks)
John Costanza and Carrie Spiegle (letters)
Nansi Hoolahan (colors)
Janice Race (edits)

Feature Characters:

Firestorm (in between Fury of Firestorm #49 and #50; also in flashback to Firestorm Vol. 1 #1)

Supporting Characters:

Ronnie Raymond (in between Fury of Firestorm #49 and #50)
Martin Stein (in between Fury of Firestorm #49 and #50; also in flashbacks to his college days and preceding Firestorm Vol. 1 #1)
Wendy Olsen (in between Fury of Firestorm #45 and #53)
Stu Schwab (last in Fury of Firestorm #41)

Villains:

Danton Black (chronologically earliest appearance; in flashback preceding Firestorm Vol. 1 #1)
Eddie Earheart (chronologically earliest appearance; in flashback preceding Firestorm Vol. 1 #1)
Brad Baxter (first appearance; a bully at Stanford University; in flashback)

Other Characters:

Crystal Frost (a fellow student of Stein's at Stanford; in flashback preceding Firestorm Vol. 1 #3)
Clarissa Stein (chronologically earliest appearance; Martin's ex-wife; in flashback preceding Fury of Firestorm #11)

Commments: Part of the flashback is a retelling of Firestorm's origin as told in Firestorm Vol. 1 #1.