Superboy in "The Duel of the Superboys"
When emissaries from the small European nation of Vala find that their hero, Prince Power, is greater than Superboy, Clark goes there to investigate. Clark then discovers that Prince Power was Superboy himself, given temporary amnesia by Kryptonite exposure.
An untitled Professor Eureka strip.
Aquaman in "Mystery of the Disappearing Island"
Johnny Quick in "The Man with the Magic Fingers"
An untitled Peg strip.
An untitled Little Pete strip.
"The Rocket's Red Glare"
Green Arrow in "The Baffling Bullets of Big John Garvin"