Challengers of the Unknown in "When Destiny Calls!"
Superboy in "Lana Lang and the Legion of Super-Heroes"
Story reprinted from Adventure Comics (Vol 1) #282.
Aquaman in "Is This My Foe?"
Story reprinted from Aquaman (Vol 1) #42.
Zatanna in "a Nightmare Called Gorgonus"
Story reprinted from Adventure Comics (Vol 1) #419.
Supergirl in "Supergirl's Three Super-Girl Friends"
Story reprinted from Action Comics #276.
Captain Marvel in "The Twisted Powers"
Story reprinted from Captain Marvel Adventures (Vol 1) #50.
The Spectre in "The Ghost of a Chance!"
Story reprinted from Showcase (Vol 1) #64.