Smallville
Lucy
S4 E16:
Lois' (recurring guest star Erica Durance) younger sister, Lucy (Peyton List), with whom Lois doesn't get along, visits Smallville and charms everyone she meets. However, Clark discovers a darker side to Lucy after he catches her stealing money from a bar. Clark forces Lucy to reveal the truth about her sudden appearance in town--a truth that puts Lois in grave danger. Meanwhile, the crystal disappears from Lana's apartment, and Jason accuses Lionel of stealing it.
Starring
Erica Parker, Peyton List, Peter Wingfield