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

After a last night together, the couples begin to co-mingle, looking around for marriage material — outside of their original relationships.

Excitement and anxiety brew as everyone forges fresh connections and selects new partners. One commitment-wary person's motivations spark controversy.

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

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

After the cocktail hour, some bonds are strengthened — and others crumble. The couples meet with friends and family and spend their final night together.

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

From discussing gender roles to rekindling sparks, the couples try to reconnect. One person's lingering emotions casts doubt on two relationships.

As one person hits a breaking point and another struggles to process her feelings, a question looms: is love alone enough to sustain a marriage?

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

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

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

Six new couples emerge from a twist-filled choice ceremony, ready to embark on three-week trial marriages. But not everyone is eager for a fresh start.

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

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.

Over matching tattoos and first meetings with loved ones, the couples continue to get closer. A romantic rumor sparks a heated exchange between exes.

Drama explodes when grievances--and receipts--are shared during the changeover. Can longtime love outlast the fallout from the trial marriages?

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?

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