I liked this ep becasue it gave us just enough background to be a teaser to us. So many unanswered questions.

Though the show seemed to center more around Galen and his anger at Isabel's death, the real question was who did the shadow ships belong to? I think we can safely assume that they were Clark's. What did the Cerberus find?

Speaking of Galen, this episode reminds me of one of Marcus Cole's best lines:
"You know, I used to think it was awful that life was so unfair. Then I thought, wouldn't it be much worse if life were fair, and all the terrible things that happen to us come because we actually deserve them? So, now I take great comfort in the general hostility and unfairness of the universe."