Smallville Season 1 - Episode 16: Stray
After Martha (Annette O'Toole) accidentally hits a young boy with her car, the Kents take him in until they can locate his parents, unaware that the boy can read minds and has unlocked the secret thoughts of Lex (Michael Rosenbaum), Lana (Kristin Kreuk), Jonathan (John Schneider) and Martha, which puts Clark's (Tom Welling) secret in jeopardy. Meanwhile, Lex must decide if he wants to take his father (guest star Lionel Luthor) up on his job offer and move back to his old life in Metropolis.
Allison Mack, Sam Jones III and Eric Johnson also star. Paul Shapiro directed the episode written by Philip Levens.
