Clark loseshis powers to another and Lex turns on him on "Leech", the February12th episode of Smallville.
When Clark(Tom Welling) rescues his classmate Eric (guest star Shawn Ashmore of X-Menfame) from harm during an electrical storm, they are both struck by lightening,resulting in all of Clark's superpowers transferring to Eric. While Ericrelishes his new life as "Superboy," Clark is torn between hishappiness at finally being normal and his growing concern for the town's safetyas Eric starts to abuse his powers. Meanwhile, Lex (Michael Rosenbaum) believeshe finally has undeniable proof of Clark's superpowers and confronts him. GregBeeman directed the episode written by Tim Schlattmann.
Leech airsTuesday, February 12 at 9:00 p.m. ET on The WB network
Thanks toauthor and comic book movie journalist AndyMangels for the info.