The story of Clark Kent culminates in this epic two-hour series finale as Clark takes the last step to becoming the Man of Steel. Watch free, streaming full episodes of Smallville on cwtv.com. 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.