Two months since the experiment ended, everyone's back for a reunion. After last night's explosive dinner party, the couples gather one last time.
The reunion dinner party brings everyone together for the first time in two months. There is laughter and joy as well as drama and conflict.
While the countdown continues for the reunion special, our remaining couples continue their lives and marriages in the real world
The experiment is over. And the four couples who have decided to renew their vows now return home to start their marriages outside the experiment.
Nadia reflects on the pros and cons of Anthony. He is reliable and steadfast, but his outspoken nature and reluctance to leave Sydney concern her.
It's the twins' turn to make the big decision - whether or not to renew their vows and spend the rest of their lives with the strangers they met eight weeks ago
The couples must part ways and leave their flats and return home to make the most important decision of their relationship: to renew their vows - or split
The couples are brought back together for one final dinner party before they head home to deliberate over the renewal of their vows - the big decision looms
The couples near the end and are on their final dates. It's the last chance to ask important questions, before deciding to continue their relationship or not.
It's near the end of the experiment and our grooms have one last chance to woo their brides on an epic final date. Which couples will crumble?
As the couples hurtle towards the end of the experiment, they face a commitment ceremony that's an emotional pressure cooker
At the dinner party, there's an argument over comments made on the boys' night. Sean reveals that Andrew made inappropriate jokes and insults.
Marriages come under the microscope as the couples have dinner with their families. Anthony puts his foot in it when he's questioned by Nadia's sister.
As the events of the homestay weigh heavily on the couples, we see one of the most dramatic commitment ceremonies yet. Will Michelle break Jesse's heart?
The homestay phase of the experiment comes to an end. Susan tries to apologise to the twins for calling them bullies last week.
The husbands visit their wives' homes. It's a chance to test the waters and see if their wife's lifestyle is one that they can fit into.
The grooms' homestays have come to an end and the couples return to Sydney for an emotionally charged commitment ceremony
It's the next phase of the experiment - the husbands' homestays. The wives get a glimpse of the lifestyle their husbands lead in their hometowns.
The couples return to the couch for the second commitment ceremony. They explain all to the experts and decide whether to stay or to leave the experiment.
As the first week of living together draws to a close, we see who has compromised and who has clashed. Then the second dinner party serves up some serious drama.
The honeymoon is over, and all our remaining couples are moving in together. It's a daunting time as the couples are exposed to each other's day-to-day routines.
The couples meet the experts, who explain a new element of the experiment - the commitment ceremony. They choose if they want to stay or leave the relationship.
The couples return from their honeymoons and are brought together at the first explosive dinner party. It becomes clear which couples connected and which didn't.
It's the next phase of the experiment as the newly-weds are sent off to various destinations across Australia and the Pacific region for their honeymoons
In a show first, the experts match identical twins. It's double the drama and double the dresses with sisters Sharon and Michelle.
Ex-model Deborah hopes the experts will find her a Polynesian husband. And single mum Lauren is not convinced when she meets firefighter Andrew at the altar.
Lebanon-born Alene is unsure when she first meets country boy Simon at the altar, and worries that the culture clash will be too much for him. Will Simon embrace it?
Nadia and Anthony struggle with wedding day nerves. Nadia isn't comfortable kissing Anthony during the ceremony, but he wins her over with a heartfelt speech.
Cheryl's nerves are proving too much and she's not sure she can go through with it, but she finds her courage and walks down the aisle. Jonathon is impressed but Cheryl is unsure.