Smallville: Season 2, Episode 2

2 - 2: Heat

Clark becomes frightened by his uncontrollable new gift of heat-vision, which allows him to start fires using his eyes, as this new found power sets his classroom and the Talon on fire. Jonathan then comes to the conclusion that his heat-vision occurs during thoughts of sex, as the first time he was watching a sex-educational video, while the second time, he was with Lana. Meanwhile, Lex is seduced into marriage by Desiree Atkins, a woman who possesses Kryptonite-enhanced pheromones that can convince any guy to do anything. After she marries Lex, she attempts to have Jonathan kill him so she can inherit his wealth.