We have three new video clips from the new Smallville episode Sleeper that will air on the CW Network on Thursday, April 24 at 8 PM ET. Click below to get a glimpse of this new episode before it hits the tube.

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Clark (Tom Welling) desperately searches for Kara (Laura Vandervoort) and Brainiac (guest star James Marsters, as Brainiac is the only one who can reverse Lana's (Kristin Kreuk) condition. Clark asks Chloe (Allison Mack) to check any large power surges in the area, so she breaks into several government computers, setting off alarms. Jimmy (Aaron Ashmore) is caught between the Department of Security who threatens him with jail time unless he helps them arrest Chloe and Lex (Michael Rosenbaum), who offers to help clear Chloe if Jimmy agrees to be in his debt. Erica Durance and John Glover also star. Whitney Ransick directed the episode written by Caroline Dries.