Poor communication puts two engagements at risk. A text from an old flame ignites drama right before a reunion bash with former podmates.

Loved ones gather while the remaining couples prepare to become husbands and wives. Who will say "I do," and who will leave the experiment alone?

The pairs turn to their parents for relationship advice. Emotions run high when the couples reunite with some of their former prospects from the pods.

Walk away or say "I do"? Life-changing decisions await the remaining couples as the big day approaches and pre-wedding festivities kick off.

As the couples deepen their bonds with adventure, relaxation and future planning, a detailed list of grievances strains one rocky relationship.

Cohabitation leads to tough conversations about cross-country moves, finances and living arrangements. A shocking discovery devastates a bride-to-be.

The remaining couples weigh doubts and dreams as they decide whether to commit to their futures together — or walk away alone.

This season's singles and married couples gather round and get real with Nick and Vanessa, dissecting everything from I do's to I don'ts.

As more couples head to the altar, some finish the day heartbroken while others — despite their doubts — take the plunge and say, "I do."

Five newly minted pairs of fiancés arrive at a luxurious resort in Mexico, where things go swimmingly for some while others struggle to stay afloat.

An intense pool party conversation has a lasting ripple effect during the next day's dates. One couple's doubts lead to a drastic decision.

The pods are now open! Singles try to make love connections through a wall, and a romantic revelation causes a stir in the women's quarters.

With the weddings around the corner, trust issues and cold feet cause turmoil. After an emotional dress fitting, a couple takes their love to new heights.

Happily ever afters or heartbreaking goodbyes? The couples decide as the experiment comes to a close in the company of friends and family.

Family meetings stir up anxiety and excitement. Two couples negotiate their potential living situations, and a date leads to a life-changing question.

As one couple commits to moving forward, another navigates heartbreaking realizations. An unexpected guest at a birthday event causes friction.

Introductions to friends and family continue. With just a week until weddings, the soon-to-be spouses go shopping--but one person shockingly opts out.

The reunion bash brings closure for some and opens doors for others. Things get real when the brides-to-be try on dresses and future grooms select suits.

A whirlwind proposal leads to a moment of truth, a pivotal ask comes with unclear intentions, and a body image conversation forges a strong connection.

In Mexico, the couples continue taking steps toward the altar... and deal with some not-so-sexy symptoms. At cocktail hour, former flings reconnect.

The couples bid farewell to paradise, head back to reality, reconnect with family and reexamine a host of hot topics with fresh eyes.

As the couples get settled back in Seattle, one suitor hopes his change of heart hasn't come too late. A confession causes tension between friends.

A shocking event puts three participants in a difficult position. As one pair opens up about their childhoods, another takes their bond to the next level.

Tensions escalate when two participants fall in love with the same person — who must make a tough decision. Another single puts a ring on it.

The reunion heats up as Nick and Vanessa Lachey revisit the drama from the pods to the present with this season's participants and special guests.