There are few sequels that are ever as good as the original. This is one of them. The only real difference between the two is that the special effects in this one are better. The story leaps right into the action, with the city of Metropolis being hit by a crime wave. One man is behind all this crime, the evil Lex Luthor. Superman battles Lex Luthor and his alter ego the Atom Man through 15 fun and exciting chapters.
Superman does a lot in this serial. Can he save Metropolis from a deadly flood? Can Superman escape the Empty Doom? Will Superman's real identity be released to the public? Will Lois Lane go to work for the Lex Luthor? Find out this and more in ATOM MAN VS. SUPERMAN
I give it 10/10. It's perfect.
(Note: Look at the close-up shots of Kirk Alyn flying as Superman. The 'S' on the Superman uniform is backwards.)