- Parents always try to make you versions of themselves. Grow up without those constraints; you can become your own person.
- — Lucas Luthor src
In 2003, Lucas was tracked down by his half-brother, Lex, who took him to Smallville. Together they plotted against their father. To expose that Lionel had regained his eyesight, after having been blind for months, and to secure Lex's position within LuthorCorp. Afterwards, Lucas was sent to an unknown location, under Lex's protection.
- Lucas Luthor was played by Paul Wesley in one episode of season two.
- Lucas Luthor was never seen or mentioned again after his only appearance. Subsequent episodes even identify Lex as being Lionel's only son (not counting the deceased Julian).
- 2 Appearances of Lucas Luthor (Smallville)
- 2 Images featuring Lucas Luthor (Smallville)
- 1 Quotations by or about Lucas Luthor (Smallville)
- Character Gallery: Lucas Luthor (Smallville)