Here are some screen caps from the season finale of Smallville titled "Arctic" due to air May 15th
LEX DISCOVERS CLARK’S SECRET — Kara (Laura Vandervoort) tells Lex (Michael Rosenbaum) he is destined to defeat the Traveler and offers to take him to the Fortress to learn how. Clark (Tom Welling) is stunned that Kara would go to Lex but it is revealed that Brainiac is impersonating Kara and she’s actually trapped in the Phantom Zone. Chloe is arrested by the Department of Domestic Security and Lana awakens from her comatose state. Meanwhile, in an epic turn of events, Clark and Lex face off in the Fortress and Lex learns Clark’s secret. Erica Durance and Aaron Ashmore also star. Todd Slavkin directed the episode written by Don Whitehead & Holly Henderson.
Thursdays (8:00-9:00 p.m. ET) on The CW.
(Click on the thumbnails for the fullsize pic.)