Story 1: Starfinger
While Lightning Lad gets his arm repaired by Dr. Lars Hanscom, the Legion of Super-Heroes are asked to help transport a rare mineral, called Rejuvium, that can rejuvenate anyone and make them young again. The Legionnaires are attacked by a new super-villain, Starfinger, who tries to steal the Rejuvium but fails, and flees. Starfinger attacks the Legionnaires again and flees, but not before Saturn Girl is able to determine that Starfinger is actually a Legionnaire.
Story 2: Superboy's Underground Exile
After a missile test, Superboy has to remain underground.
Reprinted from Superboy (DC, 1949 series) #59