Smallville revolves around Clark Kent (Tom Welling) and his burgeoning career at the Daily Planet alongside his future love, Lois Lane (Erica Durance). He's supported by his friends, Chloe Sullivan (Allison Mack) and Oliver Queen (aka Green Arrow) (Justin Hartley) as they deal with Lex Luthor's replacement, Tess Mercer (Cassidy Freeman), who initially unleashed a new world of danger in alliance with Major Zod (Callum Blue), a survivor of the doomed planet of Krypton, but has since become a sometimes ally of Clark's.