Lana says she "knows what happened to Chloe". Really? Setting aside the fact that the discovery of such a parasite would draw huge scientific and possible CDC (Center for Disease Control - although its apparently called the Disease Control Agency in a later episode) attention, is Lana really able to so readily dismiss the fact that Clark might not have been influenced in some manner, even if there was no obvious source of infection? He was unconscious (and she wasn't aware that Pete knocked him out) when she dumped him with water from a flower vase. For that matter, would Pete be so casually released from the hospital?