Smallville: Season 7, Episode 12

7 - 12: Fracture

Lex finds Kara in Detroit working as a waitress and offers to restore her memories, only to be shot in the head by an obsessive busboy. Clark must use experimental LuthorCorp technology to enter Lex's memories and find out where Kara is, while Chloe contemplates whether to use her powers to heal Lex, despite the risk to herself.