Lex discovers his long-lost brother Lucas (mentioned in "Lineage") from a situation with Asian criminals and brings him to Smallville as a ploy to buy out his father. Lucas switches sides with Lionel (who set the whole thing up), kicking out Lex who moves in with the Kents. But Lucas has plans of his own and figures out Lionel can see (as does Lex later). Lex figures things out while some of Lucas' gambling "partners" show up to make things rough for him. Lionel taunts Lucas into going after Lex, and Lucas decides to go with homicide and force Lionel to shoot him. It turns out Lionel set up everything to play the two against each other but when Lucas threatens to kill Lex, Lionel gets the gun (with some secret help from Clark) and shoots Lucas . . . but the gun has blanks – Lex and Lucas teamed up to play Lionel. Lionel gives back Lex control of the company in return for his silence in the matter and Lex keeps Lucas under his protection.
Meanwhile, Clark applies for a job at the Talon but the situation becomes hazy when Lucas butts in as Lana's new partner. He ends up losing the job to go rescue Lionel and Lex, who don't need it anyway - leaving the Clark/Lana relationship up in the air once more.