Smallville: Season 5, Episode 21

5 - 21: Oracle

Clark is visited by what appears to be the ghost of his father, Jonathan Kent. Jonathan warns Clark that Lionel is preparing to murder thousands of innocents, and Clark must kill Lionel to stop him. Meanwhile, Lex and Fine create a deadly virus, but Lex secretly crafts a vaccine without his partner's knowledge. However, Fine has secret plans of his own...