Doppelganger appears in 5 issues in this volume.
Secret of the Seventh Hero
November 1, 1961
The Legion of Super-Traitors!
February 1, 1962
The War Between The Substitute Heroes And The Legionnaires!
August 1, 1963
The Condemned Legionnaires! / Father's Day on Planet Krypton!
The Triumph of the Legion of Super-Villains!
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