Plot summary
Kate marries and finds happiness with a man but is called by Edward Mars, who promises to stop chasing her if she can truly settle down. After taking a negative pregnancy test, she tells her husband the truth, drugs him, and flees. In the present, Locke, certain that Eko died for a reason, notices a bible verse on his staff saying to "look north." Believing Ben will not free them if he removes the tumor, Jack refuses despite Kate insisting that Danny will kill Sawyer. She has sex with Sawyer when returning to her cage, and Ben "accidentally" lets Jack out to view it on the cameras, convincing him to operate. As Danny prepares to kill Sawyer, Jack cuts Ben's kidney during surgery, giving him an hour to live unless fixed and refusing to save him unless Kate and Sawyer get to leave.
Credits
Adapted from Wikipedia contributors, Lost season 3. HTML formatting and reference markers removed.