Flash [Barry Allen] (also in time travel to Showcase 4 with Barry being doused by chemicals); Darryl Frye; Kryad (98th Century time traveler, becomes Flash of his time, introduction); Alien Beast (98th Century menace, introduction)
Dr. Fate [Kent Nelson]; Inza Nelson; Malferrazae (Lord of Chaos); Inza's Jealousy Incarnate; Totec Priest; Dr. Vernon Copeland (introduction, Boston Museum curator); Judy (intro, Vern's secretary)