SNEAK PEEK: Final Duel of 'Survivor' Finale

As this season's "Survivor: Redemption Island" nears its season finale, we've got a preview of the crucial final duel.

Watch the clip to see the four remaining 'Survivors' on Redemption Island -- Matt, Mike, Andrea and Grant -- get ready for the last duel where the winner gets to re-enter the game for a shot at the one-million-dollar prize. The four also say a final prayer together before departing Redemption Island.

Tune in to CBS Sunday at 8 p.m. to see who will outplay, outwit and outlast the others on the two-hour season finale, followed by a one-hour live reunion show.