Clark returns from a bizarre phantom zone to Smallville, possessed by his Kryptonian alter ego, Kal-El. Intent on fulfilling his destiny, Kal-El takes to the skies to steal a powerful Kryptonite crystal. Meanwhile, Lois Lane (Erica Durance) comes to town to investigate the murder of her cousin Chloe. Lana returns from Paris with a new attitude and a new boyfriend, Jason Teague (Jensen Ackles). Jonathan lies in a coma after his traumatic experience in the caves. And Lionel faces a grim new life in prison.

Season 4 | Episode 1

Allison Mack

Chloe Sullivan

Annette O'Toole

Martha Kent

Erica Durance

Lois Lane

John Schneider

Jonathan Kent

Kristin Kreuk

Lana Lang

Michael Rosenbaum

Lex Luthor

Tom Welling

Clark Kent