Smallville Seson 2 - Episode 20: Accelerate
After Lana (Kristin Kreuk) is visited by the ghost of a childhood friend, she turns to Clark (Tom Welling) for help in uncovering the truth about her new visitor. However, after Clark realizes the little girl is actually a kryptonite-enhanced clone, he rushes to save Lana before the revenge-seeking child harms her. Lex (Michael Rosenbaum) learns that Lionel (John Glover) is funding the krypto-cloning research.
Allison Mack, Sam Jones III, Annette O'Toole and John Schneider also star. James Marshall directed the episode with story by Todd Slavkin & Darren Swimmer and teleplay by Brian Peterson & Kelly Souders.
