With only one couple left to meet their new spouse at the altar, these former singles jump into marriage headfirst; these newlyweds try to learn as much about each other as possible before spending their first night together as husband and wife.

In Denver, 10 singles take the plunge to marry strangers, sight unseen in two weeks; among them, an inexperienced bride questions her decision, while a groom's girthy secret shocks everyone; the countdown to the weddings is on.

As the newlyweds are only just beginning to navigate the challenges of living with a stranger spouse, they host their first housewarming party together; but not all is fun and games as tensions flare and quickly devolve into a shouting match.

A husband shuts down when his wife asks a question that's too personal; wife gets judged for asking the wrong question; one husband has to deal with a medical emergency; one couple has a mountain to get over.

After getting jilted at the altar the first time, one groom gets an historic second chance to be married at first sight, but his bride might refuse to marry him; the drama between the other couples could ruin what might have been a happy day.

With one pair having already exchanged their vows in Denver, the other eight singles make the final preparations for their own mile high matrimonies, but on wedding day, their anxieties reach a pinnacle.

The couples return to their honeymoon suites; a miscommunication leaves one bride feeling insecure; a frustrated bride confronts her husband who is left with more questions than answers; a shocking revelation blindsides the couples.

As the couples enjoy their honeymoon in Cancun, Mexico, one couple grapples with their cultural differences and the impact they have on their marriage; one wife doesn't know why she and her husband aren't keeping pace with the other couples.

The couple's meet up for a potluck dinner, but the fun is quickly dampened by some explosive news; Dr. Pia visits the couples just in the nick of time as new challenges present themselves.

Back in Denver after their honeymoon, the couples explore each other's homes; the couples grapple with ending their journey as newlyweds when they're faced with the tough decision of hitting the reset button or seeking a divorce.

The final honeymoon is over, and the newlyweds return to Denver to face a mountain of new challenges. Outside the city, the others gather for a relaxing retreat, and while some have high hopes of deepening their bond, others are on an outright collision course.

The newlywed couples head to Cancun, Mexico, to start their honeymoon; sandy beaches and the clear ocean water help set the tone as they try to grow their connection to last a lifetime; one couple must overcome a roadblock.

The spouses spend their one-month anniversaries ice skating, skiing and exploring the mountains on horseback, but not everyone is in the mood to celebrate; a husband's text message leaves his wife in tears.

The Denver cast returns for part two of the season 17 reunions and the emotions are at an all-time high; the cast challenges one another on their truths and when a shocking new secret is exposed, there are tears, animosity and bonds broken forever.

With decision day approaching fast, some couples begin to see things in a different light; the newlyweds gain new insight when they gather their friends for a housewarming party; a familiar face returns with a surprising revelation.

With one honeymoon in full effect, the other couples face intense issues of honesty and trust; with decision day on the horizon, the couples look to the experts for guidance in their decision of whether they should stay married or get a divorce.

With Decision Day less than four weeks away, the couples work to navigate the uncharted waters of their new lives together. And while some are left broken hearted, a new journey, and a second chance at love, are beginning for another.

With decision day less than a week away for most of our couples, the husbands and wives make one last effort to decide if they want to spend the rest of their lives with their spouse.

The couple's retreat is rocked by a life-threatening injury, which leads to new perspectives; with Decision Day around the corner, the couples work to strengthen their bonds before having to make one of the most important decisions of their lives.

The couples get creative in an attempt to deepen their connections, but when one wife speaks her truth, her husband is left blindsided; the countdown to "I do" begins for the last pair as the groom wonders if the second time will be the charm.

The shocking aftermath of Decision Day leads to some second guessing and self-reflecting for most of our couples. Meanwhile our couple on their own journey celebrates their one-month anniversary, but when they start sharing their thoughts for the future, doubts start creeping in.

Tensions are high as the entire Denver cast returns to revisit the most shocking moments from their season and reveal why their relationships have become so contentious. Accusations of deception, manipulation and cheating create even more animosity with the group as they struggle to sort out their differences.

The day has finally come for most of our couples as the fate of their futures rests on their answers for Decision Day. With the weight of such a heavy decision on their shoulders, some look to find peace within their relationship, while others look to find a way forward and stay married. But the boiling tension threatens all couples as the pressure of the day leads to unescapable confrontations and irreversible damage.

Post-Decision Day complexities persist as our couples navigate life changes with fitness pursuits, exploring the art of metal forging and even enjoying a dazzling drag show. Meanwhile, the last couple approaching their Decision Day grapples with doubts and uncertainties about their future. With less than a week remaining before their pivotal decision, the question looms: will they choose to stay married or get a divorce?

Most of our couples continue to navigate life after Decision Day; and as they build a path forward, they face one more decision, to either build a new life with their exes, or without them. And on our final Decision Day, will the foundation they’ve built allow their marriage to soar, or will the weight of uncertainty bring it all crashing down?