Smallville Season 4 Episode 17 Onyx ( Air Date 2005-04-13 ) Genre Sci-Fi & Fantasy, Action & Adventure, Drama category. Overview "A black kryptonite explosion splits Lex in two and his evil side - Alexander - is released. Alexander imprisons Lex in the mansion then gives full vent to his evil side - he threatens to evict Lana from the Talon unless she becomes his mate, jousts with Lionel, and tries to kill Clark and Chloe when they figure out his secret.".
Smallville Season 4 Episode 17 Onyx
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- Watch: Smallville Season 4 Episode 17 Onyx on CWR-CRB
- Stars: Tom Welling, Erica Durance, Cassidy Freeman, Justin Hartley
- Director: Tom Welling, Alfredo Septién, Tom Flores, Anne Cofell Saunders, Turi Meyer, Christopher Petry, Jae Marchant, Tim Scanlan, Cristina Verano, Brian Peterson, Kelly Souders, James Marshall, Michael Tollin, Joe Davola, Brian Robbins, Greg Beeman, Joe Shuster, Jerry Siegel
