 When the "hot" new Biology teacher Desiree Atkins (Krista Allen) arrives in Smallville, Clark Kent gets excited in her presence and his hormonal surge sets off a new ability: heat vision. Lex Luthor meets and falls for Atkins and they decide to get married. Meanwhile, Clark s heat vision causes another fire at the Talon when Clark is talking with Lana, leading Clark to get briefly jailed on suspicious of arson. Lex invites Clark to be his best man, but when Desiree tries to seduce Clark, he realizes that she is a meteor freak with the power to seduce men.