Number 60 of the 82 episodes of TDTVS so far’s main protagonist is John Locke.
Off island we see him reluctantly reunited from his con man father who “stole” his kidney a while back. John’s father is conning a woman and her son finds John to get him to help spoil the plan. As usual John is powerless to stop dear old dad and as a consequence of his actions gets tossed out an eight story building, breaking his back which is how he ended up in the wheelchair.
When he started out with Sayid and Kate their goal was to rescue Jack from the Others, but some time after their visit to the Flame Station it changed drastically. A liberated package of C4 is put to “good” use in blowing up the Others link to the outside world, a small submarine.
One of the best bits of dialog on the show ever comes from this episode. Locke is in Ben’s cabin holding Ben’s daughter Alex hostage, when unexpectedly, a group of Ben’s friends show up. Locke takes Alex into a closet. Richard Alpert comes into view and Ben says, “I want you to bring me the man from Tallahassee.” After Tom leaves and Locke and Alex emerge from the closet, Locke asks about the man from Tallahassee and asks if that is a codeword. Ben replies that they have no secret codes, although perhaps they should have one for “a man with a gun is holding my daughter hostage in the closet”.