Fair rating?Smallville· Season 4 · Episode 17
Onyx
A kryptonite-based explosion at the Luthorcorp lab creates an evil clone of Lex, and the sinister twin tries to prevent the process from being reversed by taking drastic measures, which include imprisoning Lex in the basement of his own mansion.
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#16In Season 4of 22 rated episodes
#101All-timeof 217 rated episodes
−0.4vs season avgSeason 4 averages 7.9
2005First airedApril 13, 2005
Guest stars
Malcolm Stewartas Dr. Sinclair
Rekha Sharmaas Dr. HardenCarra Maureenas Heike
Craig Lapthorneas Security Guard
Crew
Terrence O'HaraDirector
Steven S. DeKnightWriterShows like Smallville
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