Chloe learns that a doctor, Dr. Curtis Knox (Dean Cain), has been treating meteor-infected people and eliminating their abilities. Desperate to get rid of her power, Chloe makes an appointment to see Knox, unaware that he has a nefarious plan to kill his patients and harvest their organs. Meanwhile, Kara (Laura Vandervoort) cons Jimmy into helping her locate her crystal and, after discovering its whereabouts, defies Clark's order to stay on the farm. And Lana sets up secret surveillance of Lex.

Season 7 | Episode 4

Allison Mack

as Chloe Sullivan

Annette O'Toole

as Martha Kent

Erica Durance

as Lois Lane

John Schneider

as Jonathan Kent

Kristin Kreuk

as Lana Lang

Michael Rosenbaum

as Lex Luthor

Tom Welling

as Clark Kent