Smallville - Season 8 Episode 9 -

When Chloe begins having memory loss when the essence of Brainac begins replacing her memories with Kryptonian codes, Clark decides to use the Cryrstal of Knowledge to reconstruct the Fortress of Solitude and ask the spirit of Jor-El for help. Meanwhile, Jimmy begins to worry about Chloe's well being, while Davis, disturbed by knowledge that he may have alien origins, begins to become drawn to Chloe.