In Austin, 10 singles prepare to marry complete strangers in a quest for love; as two couples say "I do," sparks fly, but first impressions falter when one newlywed clashes with their in-laws and another faces a shocking twist with their new family.

The wedding journey continues as four new singles prepare to meet their matches at the altar, but for some, it's not the first time they've said "I do"; the four newlyweds face their first night together, where anything can happen.

The final couple meets at the altar; some newlyweds bond fast, but others quickly begin to unravel.

As the honeymoons continue, some newlyweds fall in love, while others fall apart.

As the honeymoons come to an end, some couples plan for their future together, while others feel the need for space; one bride's attempt at intimacy takes an unexpected and awkward turn.

As the newlyweds return from their honeymoons, they move in together and the challenges of married life set in; one couple faces a heated argument while another reaches a breaking point.

While one couple picks up the pieces after an explosive meeting with an expert, another begins to fall apart; hope remains, as one couple takes a big step forward.

The couples celebrate their one-month anniversary; while some bonds grow stronger, others face the truth that love isn't certain for all.

As a lie spirals into a major conflict that could end one couple's marriage, truths are revealed by other couples that shift their relationships in new directions -- for better or for worse.

The couples head off for a weekend retreat; one wife questions her marriage; one couple hides a secret, while another wonders if they'll ever be able to fully merge their lives.

As the retreat winds down, one couple makes amends while the others begin planning for the future; another serious roadblock arises that forces one pair to confront deep issues and question the fate of their marriage.

As Decision Day nears, the couples prepare for the biggest choice of their lives, questioning love, trust and authenticity in the process; one wife is blindsided by life-changing news.

During Decision Day in Austin, the newlyweds face the final reckoning; the stakes have never been higher as the couples face the ultimate choice: stay married or walk away for good.

People looking for the perfect partner are scientifically matched up and married on the spot.