Smallville Season 10 Episode 21 Finale ( Air Date 2011-05-13 ) Genre Sci-Fi & Fantasy, Action & Adventure, Drama category. Overview "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.".
Smallville Season 10 Episode 21 Finale
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- Watch: Smallville Season 10 Episode 21 Finale on CWR-CRB
- Stars: Tom Welling, Erica Durance, Cassidy Freeman, Justin Hartley
- Director: Turi Meyer, Anne Cofell Saunders, Tom Welling, Tom Flores, Alfredo Septién, Christopher Petry, Cristina Verano, Tim Scanlan, Jae Marchant, Brian Peterson, Kelly Souders, James Marshall, Brian Robbins, Greg Beeman, Joe Davola, Michael Tollin, Jerry Siegel, Joe Shuster
