Join Michael Rosenbaum as he describes Lex Luthor’s return! Don't miss the two-hour series finale of Smallville, this Friday at 8/7c. Smallville Video: Watch Smallville full episodes, previews, clips, interviews and more video. Smallville starring Tom Welling as Clark Kent and Erica Durance as Lois Lane is a modern retelling of the Superman legend and its classic characters continue to blend realism, action and emotional depth to reveal a new interpretation of the enduring mythology.