Smallville V (21/22)

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 (recurring guest star JAMES MARSTERS) deadly virus, Fine intervenes and injects Lex with the vaccine, causing a shocking reaction.

Tom Welling, Michael Rosenbaum, Allison Mack, Kristin Kreuk, Annette O'Toole, John Schneider