Action Comics #13

Superman's best friend Krypto returns! Superman ventures into the Phantom Zone to face a mysterious threat and receives some help from an old family friend.

Characters: Ak-Var, Brainiac, Brainwyrm, Erik Drekken, General Zod, Jax-Ur, Jor-El, Krypto, Kryptonite Man (Ramsay), Lara Lor-Van, Metallo, Mrs. Nyxly, Nimrod The Hunter, Non, Phantom Stranger, Superman, Susie Tompkins, Ursa, Va-Kox, Vyndktvx, Xa-Du