While in the barn of Kent Farm with Shelby waiting for Chloe, Clark is attacked and awakes in a mental institution in the middle of a session with Dr. Hudson. The psychologist tells him that for five years he has been delusional, believing that he has come from Krypton and had superpowers. Clark succeeds to escape, and meets Lana, Martha and Lex that confirm the words of Dr. Hudson. Only Chloe believe on his words, but she is also considered insane. Clark fights to find the truth about his own personality and origin.<br /><br />"Labyrinth" is undoubtedly the most intriguing episode of "Smallville". The writer was very luck and original denying the whole existence of the powerful boy from Krypton. The annoying hum gives the sensation of disturbance and the identity mysterious saver need to be clarified. My vote is nine.<br /><br />Title (Brazil): "Labirinto" ("Labyrinth")