Clark returns to Smallville as Kal-El - intent on fulfilling his destiny, he goes after a powerful kryptonian crystal that Lex has obtained in Egypt. Meanwhile, newcomer Lois Lane arrives in ...

Smallville's Season 4 episode "Transference" sees Clark Kent and Lionel Luthor switching bodies.

Tom Welling revealed that he refused to do a musical episode of Smallville, to the point where he considered skipping out on filming!