Challengers of the Unknown in "Tomorrow's Answers"
Supergirl in "Supergirl's Greatest Challenge"
Story reprinted from Action Comics #287.
Aquaman in "Underworld Reward, Part 2"
Story reprinted from Aquaman (Vol 1) #45.
Captain Marvel Jr. in "The Mystery of the Missing Newsstand"
Story reprinted from Shazam (Vol 1) #9.
Superman in "Superman's Super-Courtship"
Story reprinted from Action Comics #289.
Sandman in "Dreams of Doom!"
Story reprinted from Adventure Comics #77.
Wildcat in "Hang'em Up, Wildcat - Your Finished!"