Still distraught over her break-up with Clark, Lana experiments with a dangerous serum that allows her to flat-line and see her deceased parents again. A worried Clark rushes to save Lana from hurting herself, but ends up being injected with the kryptonite-laced serum by a rogue doctor (Patrick Currie). When Clark flat-lines, he is able to talk to his father, recently deceased Jonathan, who warns him that Lionel knows his secret. Meanwhile, Lionel continues to get closer to Martha .