Professor Fine has unleashed a virus that will kill millions. Clark must put a stop to him, while Lex wonders what happens when he will tell Lana his newest secret.
Tom Welling
Clark Kent
Erica Durance
Lois Lane
Kristin Kreuk
Lana Lang
Michael Rosenbaum
Lex Luthor
Allison Mack
Chloe Sullivan
John Glover
Lionel Luthor
Annette O'Toole
Martha Kent
John Schneider
Jonathan Kent
James Marsters
Milton Fine
Terence Stamp
Jor-El (voice)
