The UK's boldest social experiment concludes, as experts Mel Schilling, Paul C Brunson and Charlene Douglas welcome back all the 16 participants for a final review.

It is vow renewal time for the last of the newly-weds. As one couple reveal their decision, the other two face the toughest choice of their lives.

With the final vow renewals approaching, three of the couples spend time apart to reflect on their future.

The remaining couples come together for one last time at the final dinner party, but celebrations are quickly cut short when the honesty box delivers uncomfortable questions.

The couples embark on their final dates, giving them a last chance to experience some time away from the group to consider their futures.

The homestays continue, but as friends and family voice their doubts, one couple are pushed to crisis point. And Partner Swap leaves some questioning their relationships.

The couples get a taste of the future as they embark on their homestays, but immersing themselves in each other's worlds raises big questions for some.

Feelings deepen and the stakes are raised at the third and final Commitment Ceremony, and some couples have to decide whether to call time on their marriages.

Tensions run high at the third dinner party as the repercussions of Girls' Day are felt and tempers fray between couples, while anonymous letters lead to tempers fraying.

The couples spend time apart at group girls' and boys' days out. While Bob gets a few home truths from the lads, Megan and Alexis lock horns again.

Marriages are put under the spotlight once more at the second Commitment Ceremony, as the experts deliver some hard-hitting truths to help the couples progress.

The second dinner party brings surprise guests, which sends shockwaves through the group. A dream couple hit their first bump in the road and Amy questions her future with Josh.

Yes Week brings some of the couples closer together, but pushes others to breaking point, while an ultimatum from Luke prompts Morag to turn up the heat on their relationship.

In the first Commitment Ceremony, marriages are put under the spotlight by Mel Schilling, Paul C Brunson and Charlene Douglas, but events take a shocking turn.

With weddings and honeymoons over, the newly-weds embark on the next stage of the experiment - moving in together. Later, all eight couples meet for the very first time.

Four more couples head off on their honeymoon. Some couples struggle to find their spark, and another couple quickly hit rough waters.

The final four plunge into marriage with a complete stranger, with one couple struggling to connect, while a bride goes against the advice of her family to find love.

The experts match another two couples, but when the big day arrives, one bride and groom discover their differences may be an issue, while the other couple have big surprises.

The first four couples head off on their honeymoons. While some relationships blossom, others begin to question their compatibility.

Another four strangers take the ultimate gamble on love, and later, the programme celebrates its first ever same sex wedding.

experiment where single people, matched by experts, marry total strangers, who they meet for the very first time on their wedding day

Before our 16 strangers walk down the aisle, they celebrate their last night of freedom, at the ultimate stag and hen parties, where a surprise is in store. And the first two couples get married.