The first two couples paired up by the relationship experts meet at the altar for their wedding ceremonies. Will romantic sparks fly when they lock eyes for the first time, or could doubts creep in?

Another two couples experience a very unusual first date - their own wedding! One bride's feeling daunted but the final pair experience instant attraction. And all four couples go on their honeymoons.

The heat is turned up on the pressure-cooker relationships as the newlyweds move in together and begin to experience everyday married life. How will they fare in their first few days as Mr and Mrs?

The experiment has reached its halfway stage and an intimate dinner party in Sydney provides the first opportunity for the four couples to meet and compare how their relationships are working out.

With one week to go until the newlyweds have to make their big decision, some of the couples manage to visit the in-laws, improve communication and strengthen relationships but one pair are struggling.

The social experiment is over and the relationship experts gather to hear the couples make one of the biggest decisions of their lives. Will the participants opt to stay married or ask for a divorce?

The expert team of matchmakers pair up the first two couples and the cameras follow the preparations for their big day. How will they react on meeting for the first time at the wedding ceremony?

Two pairs of newlyweds wake up in their beds for the first time as husband and wife. The last two couples are matched up by the experts and all eyes are on them as the wedding ceremonies begin.

The four pairs of newlyweds spend a week getting to know each other on their honeymoons. An expectation of romance and intimacy hangs in the air, but not all of the couples are comfortable together.

After knowing each other for only a week, the couples move in together. There's nowhere to hide and emotions run high as they grapple with sharing their personal space on an intimate level.

A dinner party occurs, attended by all four pairs of newlyweds. The couples compare the strength of their own relationship with those around them, but no one is prepared for the fireworks that ensue.

Decision day is just over a week away and the couples are feeling the pressure as they weigh up the strengths and weaknesses of their union. They also face the test of a weekend with the in-laws.

With just 72 hours to go, the couples temporarily separate and avoid all contact with each other while they seek the counsel of friends and family. The stakes are high and hearts are on the line.

The experiment comes to an end as the newlyweds decide: will they stay in their relationships or cut their losses? Two months later, cameras revisit participants to see which pairs are still together.

Australia's most controversial social experiment is back. More couples and more pressure than ever. Tonight there's two big weddings, and for the first time the brides and the grooms get together at separate Bucks and Hens nights.

Australia's most controversial social experiment is back. More couples and more pressure than ever. Tonight two weddings and a big secret is revealed that will shock one bride.

Australia's most controversial social experiment is back. More couples and more pressure than ever. Tonight two weddings. Is one groom ready for a culture clash he didn't see coming?

Tonight, Lauren the single Mum looking for love a second time around has a big decision to make and divorced Dad of two, John, faces an emotional day for him and his daughters.

Tonight, it's the final weddings as identical twins Sharon & Michelle walk down the aisle together in the biggest wedding in Married At First Sight history.

Tonight, the runaway bride is confronted for the first time with her jilted husband as the other couples come to terms with married life on their honeymoons.

More couples and more pressure than ever. Tonight, sparks fly at the first weekly dinner party. Who is flirting with who and who storms out?

The first weekly commitment ceremony. Who will choose to stay and who will leave the experiment plus a shocking revelation that will rock everyone.

The couples move into an apartment building together and a twist in the experiment that no one sees coming.

The second dinner party erupts as guards come down and people start to reveal their true feelings.

The fallout from the dinner party rocks the commitment ceremony as the couple have to decide whether to stay or leave the experiment.