When Jonathan begins to act strangely, Clark believes Jor-El is sending Jonathan messages through the key and is the cause for his father's withdrawal from the family. Clark goes down to the caves to confront his biological father but Lionel catches him there and begins putting the pieces together - leading him straight to Doctor Swann. As the two billionaires face off, a deal is struck and Lionel's true motives are revealed. This episode was very well written, acted and directed. Once again, the crew filmed on location in a real city - New York.
