I liked the various villains used in these episodes. Both Vixen and the shadow man served as good physical threats to Superman, and as a big fan of Lex Luthor, I enjoyed the character of Lex Luthor, Jr.
I also liked the plotline about the possibility of Lois and Clark having kids. Seeing as how Lois and Clark had just gotten married earlier that season, I will admit that it does seem like it was a little soon to be having the discussion about children. Still, I liked the exploration of the possibility of Superman being able to have a child as well as the debate as to whether or not a couple with busy lives such as Lois and Clark were ready for children.
It's a shame that they couldn't get John Shea back one time during season four since it would ultimately be the last season of the show, but these episodes serve as a good substitute for actually having an episode or two with Lex. And, at least we did get some closure to his character in his last appearance in season three.
