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Adventure Comics#300
Cover: Curt Swan & George Klein
Adventure Comics #300
“The Super-Planet of Clark Kent and Lana Lang!”
writer Jerry Siegel · artist John Forte · artist Al Plastino · inker John Forte · inker Al Plastino · letterer Milton Snapinn · cover Curt SwanGeorge Klein
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Full credits
writer Jerry Siegel
artist John Forte
artist Al Plastino
inker John Forte
inker Al Plastino
letterer Milton Snapinn
cover pencils Curt Swan
cover inks George Klein
Full plot ⚠ may contain spoilers
▸ Reveal full plot — may contain spoilers
At a regular meeting of the Legion of Super-Heroes, the Legionnaires lose control of their powers. Urthlo arrives and announces that he now controls the Legionnaires' powers and there is nothing they can do about it. But Saturn Girl comes up with a serum to temporarily cure Mon-El and immunize him against lead, and Superboy releases him from the Phantom Zone to knock out Urthlo, who turns out to be an automaton created by Lex Luthor sent into the future to destroy the Legion.
Plot details indexed by the Grand Comics Database (CC BY-SA).