The Man from Tallahassee

Locke shows up at the Others' place. He wants to see Ben. He wants the submarine. He blows it up. Nobody leaves the island anymore. Ben watches him do it. Almost admiring.

Flashback. Anthony Cooper, Locke's father. The one who abandoned him. The one who came back to steal his kidney. Locke confronts him in his apartment. Cooper pushes him out the window. Eight stories. Locke crashes down. Paralyzed. That's it, the origin of the wheelchair.

Ben asks Locke: "What would you say if I told you your father is here? On this island?" He opens a door. Cooper is there. Tied up. Alive. The island brought Locke's tormentor right to him. Ben knows exactly what he's doing.