Two couples find closeness and comfort, while others struggle with tension and fights. Romance heats up at home for one pair.

For one couple, tension leads to a heartfelt moment of growth. Two pairs come together over their trauma, and a blowout fight tests an existing bond.

After talking through issues from bathroom storage to bedtime massages, five new couples emerge. Now it's time to stress-test a trial marriage.

Newfound feelings simmer as the couples settle into their shared lives. As some pairs get intimate, others confront betrayal and breached boundaries.

One year after the ultimatum, the participants reunite for an emotionally charged evening of heated exchanges and healing revelations.

Through tears and harsh truths, the original couples reunite. Later, a group cocktail party stirs up shocking revelations, leaving some people shaken.

After two trial marriages and six weeks of emotional tumult, a life-changing decision looms. Who will pop the question — and who will start over solo?

Shocking updates, hard truths and powerful realizations come to light when the group reunites for the first time since the conclusion of the experience.

After one last night together, the couples go their separate ways to date the other newly single participants as chemistry and confusing emotions swirl.

Revelations are shared during the changeover. Will a one-night stand break one couple — and will someone new come between another?

With Ultimatum Day upon them, the couples make their life-changing decisions — who will walk away newly engaged, and who will walk away alone?

From having kids to coming out, date conversations get real. A juicy love triangle forms, and one person's flirtatiousness causes a commotion.