episode synopsis
Lois' (
Erica Durance) younger sister, Lucy (guest star
Peyton List), with whom Lois doesn't get along, comes to town and charms everyone she meets. However, Clark (
Tom Welling) discovers a darker side to Lucy after he catches her stealing money from a bar and forces her to reveal the truth about her sudden appearance in Smallville, a truth that puts Lois in grave danger. Meanwhile, the crystal disappears from Lana's (
Kristin Kreuk) apartment and Jason (
Jensen Ackles) accuses Lionel (
John Glover) of stealing it.
Michael Rosenbaum, Allison Mack, Annette O'Toole and John Schneider also star. David Barrett directed the episode written by Neil Sadhu & Dan Sulzberg.