 By the end of season two , Lana and Clark slowly try and start a romantic relationship , but fear backlash from Chloe because of her personal feelings for Clark . Just as the two give in to their feelings fully , Clark unexpectedly runs away from Smallville in the season two finale . At the start of season three , it is shown that Lana , alongside the Kents , has been spending her time searching for Clark ; she ultimately finds him in Metropolis thanks to Chloe 's help . Clark 's actions in Metropolis force the two to rethink their relationship in the season three episode " Phoenix " , and Lana eventually begins a new relationship with Adam Knight ( Ian Somerhalder ) , a guy she met while in physical therapy after being trampled by a horse in season three 's " Asylum " . By the season three episode " Crisis " , it is discovered that the relationship Adam attempted to form with Lana was just a ploy so that Adam could investigate Clark . 
