John Locke, Lost ‘s resident knife-wielding guru, will be the focus of Tuesday’s episode, “The Substitute.” And, given recent turns of events, that probably means we’ll see more of ...

Our favorite castaways thus far have been on the island a few months, but for Lost fans ... in ABC's island-based odyssey. Locke, by the "Numbers": John Locke (played by Terry O'Quinn) was ...