The Islanders choose which boy and girl to send home; Casa Amor begins, and new singles arrive.

The villa takes on Casa Amor in the two challenges: "Shaken and Stirred" and "Raunchy Races."

As new connections form, Isaiah and Deb are torn; the Casa Amor Hideaway opens for the first time.

As Casa Amor comes to an end, the Islanders must decide to maintain relationships or recouple.

Narrator Iain Stirling shows the Islanders in a new light with the best unseen moments from Week 4.