Krypton Chronicles

Bring Back Yesterday!
Superman, deducing that the Yagrum is only an illusion, walks through it. Zor-EL enables Superman to learn the stories of some more of his ancestors through a device connected to their headbands, which have absorbed some of their memories. In this fashion, he learns of Hatu-El, who helped liberate the Kryptonians from the Vrangs who had conquered them; of Sul-EL, who developed a telescope, saw the Vrang fleet in space, and tried to warn the governor of Kandor; of Val-EL, an explorer who discovered new lands; and of Val's brother Tro-EL, who led an unsuccessful mutiny and became founder of an isle of pirates. Supergirl captures Black Flame, who has been trying to prolong Superman's and Supergirl's stay until the Cosmic Axis shifted again and prevented them returning to Earth. After saying their farewells, Superman and Supergirl leave Rokyn shortly before it vanishes, and Superman tells his cousin he has another ploy to get information on his ancestors who came before Val-EL.