Six Couples tie-it-on in the Challenge Arena as the race is on for top five. Milly and Bailey shout their love to the top of the coconut palms and the power plays intensify as elimination looms.

A sandbank in the middle of nowhere sees our top five couples admit their motives and dive for bonus cash. Will love or money carry the biggest payload?

It's Sink or Swim in the Challenge Arena to decide who's on the chopping block, just as Ash and Tobias admit their feelings for each other.