First Aired: Apr. 15, 2003 on The WB
Summary: Clark's new schoolmate uses heat-vision to prove that he's an alien, but Clark suspects he's not from his own planet - but from Krypton, instead. Meanwhile, Helen asks Lex some hard questions...
Main Characters in this Episode
Lex Luthor: Do you believe there are aliens among us, Clark?
- First time in the series the name 'Kryptonite' is used. Clark tells Pete the actual name of the meteor rocks being known by this name.