"The Starry-Eyed Siren of Space"
A super-nova explosion sends Superman to a strange, dead world, where the only inhabitants are a pair of living brains. One of the brains has created a living body, and the other enlists Superman's help in rescuing her before she becomes stuck in the fleshy form.
"Fabulous World of Krypton: The Death Trails of Krypton"
Kryptonians wonder about the nature of deadly sky trails that pass through their atmosphere.
"The Battle of Atoms"
Reprinted from Superman (1939) #38