Superman #205

Superman #205 On Sale: February 6, 1968) features a cool cover by Neal Adams.

"The Man Who Destroyed Krypton" is by Otto Binder and Al Plastino. An emergency meeting is called by the President and his military advisers because Earth is threatened by the space villain Black Zero. The officials appeal to Superman for help, and he soon uncovers the villain masquerading as the Chief of Scotland Yard. During their first confrontation, Black Zero reveals to Superman that he was responsible for Krypton's destruction. Following Jor-El's speech to the Science Council, the explosive reaction in the core was dying down, but Black Zero rekindled the atomic fires which resulted in the planet's eventual doom.

Black Zero proves to be a difficult opponent for Superman to fight. He gains help from Jax-Ur. Though normally the Man of Steel's foe, the Phantom Zone criminal wants revenge for Krypton's destruction. Superman is able to locate the anti-matter bomb that will destroy Earth, but he cannot divert it. Superman still prevails by drilling a hole through the Earth for the missile to pass.

Black Zero then tries to destroy Metropolis, but Jax-Ur turns him to stone. Before returning to the Phantom Zone, Jax-Ur destroys the stoned Black Zero, so that the villain can never be restored to life. Ouch, that's gotta hurt!

Edited by Mort Weisinger.