Martha is seriously sickened by meteor dust, and Clark and Jonathan desperately try to help her. But when Clark becomes infected as well, he finds out just how vulnerable he can be. Only a miracle can save Clark and his mother --and the amazing secret she holds within. Meanwhile, Lex confronts his feelings for Helen (recurring guest star Emmanuelle Vaugier) as she considers an enticing out-of-town research position. And Chloe and Lana cope with the unthinkable possibility that they may lose Clark forever.
Clark learns that a Phantom Zone escapee has landed in Seattle and slaughtered the entire crew of a Taiwanese cargo ship. Upon further investigation, Clark comes face to face with the horrifying phantom, Aldar (professional wrestler Batista), who sucks the bones out of people. Meanwhile, a patient with the ability to travel between planes of existence escapes from LuthorCorp's secret experimental laboratory and seeks revenge on Lex.
Mitch and Jamie brave an animal attack at the Russian Embassy in Washington, D.C., and Jackson finally gets the answers he's been looking for from a surprising source.
