Yes- he will appear in the two-part series finale played by Michael Rosenbaum.
Yes, Lex Luthor returned in the last episode of Smallville which is titled "Finale."
Lex Luthor - Smallville - was created in 2001.
However old this question is, it is now Season 10, in 2010-2011. Chloe has never really been gone longer than two episodes, so yes she is still here in all 10 seasons. Tess is still there, too. Lex may be coming back! I mean he is the main villian! I think that since black kryptonite split the good and bad Lex, and the bad Lex disappeared, and Oliver killed Lex, I think that the good Lex was killed, but the bad Lex lives and will come back.
The teaser for the series finale has revealed that Michael Rosenbaum returned to play his role one last time just for the fans.
Lex is just a nickname for Alexander Luthor in Smallville.
The actors that returned in the final episode of Smallville are Michael Rosenbaum which the one that plays Lex Luthor, John Schenider which is the one that plays Jonathan Kent and Annette O'Toole which is the actress that plays Senator Martha Kent.
Yes he will be back because if anyone is stupid enough to not believe that is Michael rosenbaum is really dumb. The people making Smallville are trying to keep it a secret that Michael isn't coming back, but he is because then clark won't be superman ever.
Is small ville coming back in 2012
no
No, Lex was not mentioned in season 10 nor did he appear there.
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Lex Luthor's secret lab in smallville