Superboy in "The Two Worlds of Superboy"
Story continued from last issue.
After Superboy leaves Earth, Duke Mason realizes that he can't get revenge on Superboy by having the Kents killed, and dies in the electric chair without revealing Superboy's secret identity. Superboy then returns to earth having perpetrated a ruse to keep Mason from killing his parents.
Aquaman in "Aquaman, Outlaw of the Sea"
Green Arrow in "The archer Who Lost his Aim"