Sawyer and Jack have shared many conversations through six seasons of Lost, but none like what viewers will witness on Sunday night.

As the following clip depicts, the friendly rivalry between these two characters takes on a whole new meaning, now that Jack is the "new Jacob," as Sawyer dubs him below.

Does Jack feel any different in this capacity? No, he says. Might that be because he won't be holding the role for very long? We'll soon find out...

[video url="http://www.tvfanatic.com/videos/series-finale-clip/" title="Series Finale Clip"] [/video]

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.