Superboy helps his physical double, the Prince of Sardonia, foil a potential usurper to the throne. The newest Legionnaire, Matter-Eater Lad, is accused of being a spy.
Printed: Dec 1962
Writers: Leo Dorfman and Jerry Siegel
Art: George Papp and John Forte
Cover: Curt Swan and George Klein
- 1st appearance and origin of Matter-Eater Lad
