Smallville Season VII Episode XX

Brainiac has been impersonating Kara,who is trapped in the phantom zone, revealing Clark's secret to Lex, encouraging him to control Clark with the orb. After killing Brainiac, Clark goes to visit Lana, only to find that she leaves a video requesting Clark not to look for her.  Chloe is arrested by the DDS before telling Jimmy to ask for Clark's help. Lex travels to the North Pole, discovering the Fortress, despite Clark's request, he put the orb on the crystal, causing the Fortress to fall.