Smallville (2001)

S03E17 Legacy

As Jonathan starts exhibiting unusual behavior, Clark suspects that Jor-El is communicating with him via the key, causing Jonathan to distance himself from the family. Determined to confront his biological father, Clark heads to the caves, only to be interrupted by Lionel, who starts connecting the dots and is led to Dr. Swann. In a tense encounter between the two wealthy adversaries, they negotiate a deal, unveiling Lionel's hidden agenda.