As Braniac replaces Chloe's memories with Kryptonian code, all she can remember is Davis.  Clark uses the crystal he was sent to rebuild the Fortress of Solitude.  Clark takes Chloe to the Forstress to have Jor-El restore her memories.  However, Clark has one memory not restore... the one where Chloe knows his identity.  As Jor-El restores her memories, Braniac leaves Chloe and instead infects the fortress, unbeknownst to Clark.  With her memories back, Chloe resumes planning her wedding with Jammy.  Davis comes to Chloe to tell her he loves her and she's marrying the wrong man.