'Smallville' Sneak Peek: Two Clarks are Worse Than One

Smallville returns this Friday to finish out the series with its last six episodes. First up, Clark gets some blasts from another world as the mirror box and the alternate universe where Clark was raised by Lionel Luthor makes a comeback.

In this clip from Friday's episode, "Kent," Clark finds out that even though he destroyed his mirror box, making sure he wouldn't go back to the evil alternate reality, the other side's mirror box is perfectly fine, bringing Clark Kent face-to-face with Clark Luthor. Read More...