Five couples arrive at a paradise retreat for intensive therapy; infidelity shakes Kalani and Asuelu's world; Angela threatens divorce; Yara confronts her nemesis; Ed and Liz want to move beyond their breakup cycle; Molly and Kelly try to heal.

A blindfolded obstacle course puts relationships to the test; Angela communicates better with another man than with Michael; Yara reveals a secret she's been keeping from Jovi; Ed gets called out for cheating during a trust-based challenge.

Liz triggers Angela, who ends up having to discuss her anger issues with Dr. Janie; Yara's romantic gesture ends with a drunken debacle; Liz and Ed struggle to communicate; Kalani and Asuelu take a shaky step forward.

Sex therapy exposes the couples' intimate vulnerabilities; Angela and Michael find a new way to enjoy their long-distance relationship; Jovi and Yara struggle to get on the same page; Molly and Kelly seem to reach an impasse.

The couples talk about failing and succeeding at their sex therapy homework; Jovi plans a surprising experience for Asuelu; Angela scares Kalani and Yara with what's hidden in her swimsuit; Ed discovers who he was in a past life.

Kalani, Yara, Angela and Liz bond at a lingerie party, and Yara talks about her insecurities; Ed demonstrates one of his intimate skills; Kama Sutra therapy pushes one couple to their breaking point; Kalani reveals why she can't forgive Asuelu.