When Clark (Tom Welling) tries to warn Lana (Kristin Kreuk) and Chloe (Allison Mack) about Ian (guest star Thomas), an overachieving student who is surreptitiously dating both girls, they accuse Clark of jealousy but realize too late that he was right. Meanwhile, frustration with his father (John Glover) causes Lex (Michael Rosenbaum) to lose his temper and attack a parking attendant's car with a golf club, landing him in an anger management class where he meets an interesting new woman.