Clark is stunned to see his father's ghost at the graveyard but becomes even more confused when Jonathan tells him to kill Lionel. Meanwhile, after Lex develops a vaccine for Fine's (James Marsters) deadly virus, Fine intervenes and injects Lex with the vaccine, causing a shocking reaction.

Season 5 | Episode 21


Allison Mack

as Chloe Sullivan

Annette O'Toole

as Martha Kent

Erica Durance

as Lois Lane

John Schneider

as Jonathan Kent

Kristin Kreuk

as Lana Lang

Michael Rosenbaum

as Lex Luthor

Tom Welling

as Clark Kent