The remaining couples decide whether or not to continue their relationships outside of the experiment in some of the most emotional vow ceremonies ever.
The experts produce the Honesty Box for the final test of the couples' commitment before they take their final vows. Rumours are spread that Bryce has a secret girlfriend.
When the couples get together for dinner, Bryce wants to apologise to Rebecca, but she isn't willing to forgive him. Moreover, several people have something to say about Bryce.
During dinner, one of the couples breaks up dramatically. Bryce and Melissa made amends, but Rebecca rekindled the fire between them. The couples get to know each other better during a week away.
The new couples are moving in together to get to know each other better. Drama ensues as Bryce finds himself in the line of fire when the couples get together for a dinner party.
All couples are invited to the third commitment ceremony. One couple has to leave the experiment after meeting the parents. Melissa has to face her separation anxiety.
Another wedding ceremony is taking place. Meanwhile, the newlyweds go on a honeymoon. Jo and James have a serious conversation in which they wonder if they want to give their relationship another chance.
With intimacy week behind them, it's time for the second commitment ceremony. The couples reveal to the experts, and to each other, whether they'll stay in their marriages or split.
Embarking on intimacy week, the couples will experience tailor made tasks set by our sexologist expert, Alessandra Rampolla. While some are smashing relationship hurdles, one of the grooms can't get his mind off another bride.
Confessions Week continues and the couples find the flow in their marriages. With Sam and Coco's marriage balanced on a knife's edge, Coco secretly reaches out to another member of the experiment for advice.
It's Confessions Week and the experts have given the couples a series of tasks to do together to help bring them closer and allow them to be honest with each other.
Our newlyweds prepare for the first dinner party of the experiment. With partners delivering hard truths, more walkouts and wandering eyes, the event divides those once united, but nothing can prepare the group for a surprise reveal.
The final weddings get underway, including one of the experiment's most anticipated matches, and a historic first for Married at First Sight Australia.
The honeymoons continue as the couples begin to get to know each other better, but the fallout from the Honesty Box confessions might be too much for some.