In this first episode, after a year of rigorous testing and measuring the experts decide who will marry who.

It's wedding day. After months of testing, two couples, matched by experts, meet for the very first time at the altar to get legally married. Will they even fancy each other?

The couples finally get some time alone and spend their first night as husband and wife before setting off on honeymoon. Five weeks later, will they decide to stay married?

Two strangers meet and marry. Will the newlyweds grow to be a real couple over the next five weeks? Or will a quickie divorce be required?

Would you marry a complete stranger you first meet on your wedding day? A panel of experts match up a couple. Will true love flourish for these two singletons looking for The One?

Two more couples put their trust in science. But will they make it down the aisle and marry at first sight?

The newlyweds head off on their honeymoons, sharing romantic activities in exotic locations. Will they fall in love? Or for one couple, will the football on TV get in the way?

In this 90-minute special, four couples who met for the first time on their wedding day live together for four weeks as husband and wife. And then they must decide whether to stay together or split.

The experts match Stephanie with Benjamin and Carrie and Wayne. Can the couples persuade friends and family that marrying a stranger isn't such a crazy idea? And will they actually like each other?

With Richard and Harriet about to exchange their wedding vows, newlyweds Benjamin and Stephanie are already on honeymoon in Mallorca - and starting to get a little closer

Stephanie and Benjamin are living together now and learning that the path to true love does not always run smoothly. And Harriet and Richard head to Lisbon for their honeymoon.

The two couples who married at first sight enter the final weeks of the experiment. Do they have a long-term future. Will they stay together or seek a divorce?

The first two couples heading down the aisle are nurse Steph and property manager Jonathan, and office manager Verity and IT consultant Jack.

While Verity and Jack exchange wedding vows seconds after their first meeting, newlyweds Jonathan and Stephanie start getting to know each other on their honeymoon in Seville

Steph and Jonathan are now living together, learning that true love doesn't always run smoothly, as Verity and Jack get to know each other on honeymoon

The two married couples are in the final weeks of the experiment. Do their 'instant marriages' have a long-term future? Will they even make it as far as Decision Day?

Primary school teacher Michelle, IT sales manager Owen, businessman David and events manager Shareen receive the exciting news that they have been matched by the experts. What will their families say?

Michelle and Owen have an awkward start to married life, leaving them questioning their fledgling romance. And David and Shareen hit a bump in the road on their honeymoon.

As the newly-weds prepare to move in together, the Covid-19 pandemic hits Britain. Owen and Michelle's lockdown love-in leads to a dilemma, while David and Shareen enjoy a romantic getaway.

After four months as husband and wife, Owen and Michelle face a make-or-break decision, as they deal with living 250 miles apart. And David and Shareen grapple with finding common ground.

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.

More strangers take the ultimate gamble - but will opposites attract when they meet at the altar? And Married at First Sight UK celebrates its first same sex wedding.

The next phase of the experiment begins as the first four couples go on their honeymoons. Some relationships blossom, while other couples aren't sure they're compatible.

The experts match another two couples, but when the big day arrives, one bride and groom quickly discover that their differences may be an issue

The final four singles plunge into marriage with a complete stranger. One couple struggle to connect, and a bride goes against her family's advice to find love.

Four more couples head off on their honeymoon. But while it's romance for some, others struggle to find their spark. And one couple quickly hit rough waters.

With weddings and honeymoons over, the newly-weds move in together. And all eight couples meet each other for the first time, at an unforgettable dinner party.

In the Commitment Ceremony, experts Mel, Paul and Charlene put the marriages under the spotlight, but a surprise confession rocks the group

'Yes Week' begins and brings some of the couples closer together but pushes others to breaking point. Plus: an ultimatum turns up the heat for one couple.

The second dinner party brings surprise guests who send shockwaves through the group. A dream couple hit a bump in the road and one bride questions her future.

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 couples spend time apart at group girls' and boys' days out. There are a few home truths from the guys and a revelation leaves the girls dumbfounded.

Tensions run high at the third dinner party, as the repercussions of Girls Day are felt. And some anonymous letters lead to tempers boiling over.

Feelings deepen and the stakes are raised at the third and final Commitment Ceremony. As some couples look to the future, others face heart-wrenching decisions.

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...

The homestays continue, but as friends and family voice their doubts, one couple reach crisis point. And Partner Swap leaves some questioning their marriages.

The couples have their final dates and their last chance to consider their futures. But will the dates strengthen bonds, or lead to difficult disscussions?

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

Three of the couples spend time apart to reflect on their future. When they're reunited, they must decide whether to stay married or go their separate ways.

It's vowel 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.

The experts welcome back the 16 participents for a final review of their experience marrying a stranger. What have they learnt about themselves?

The return of the experiment to see whether science can help people fall in love, with experts Mel Schilling, Paul C Brunson and Charlene Douglas ready to help 16 hopeful singles find their perfect match. Before these strangers walk down the aisle, they get to celebrate their final night of freedom together at the ultimate stag and hen parties - where a surprise is in store.

Another four strangers take the ultimate gamble on love and tie the knot with a total stranger. While one bride gets more than she bargained for, an overprotective friend threatens to spoil the big day for a groom and his new husband.

The next phase of the experiment begins, as the first four couples embark on luxury honeymoons in the sun.

One groom's surprise announcement might leave him stranded by a runaway bride, and a twice-married single mum hopes to find love that will last.

Four more singles agree to marry a perfect stranger, but while one bride-to-be hopes to meet the woman of her dreams, another's high expectations could be a recipe for disaster.

The next group of newlyweds fly off to tropical climes, but while fun in the sun is on the cards for some, others find their first break away together far from blissful.

A brand-new chapter of the experiment begins for all of the couples, as they gather together for their first dinner party under the watchful eye of experts Mel, Paul and Charlene.

The couples have reached the first Commitment Ceremony, where they meet to discuss their marriages with the experts and also make a critical decision.

It’s Yes Week... the newly-weds explore power play in their marriages and move in together

At the second dinner party, two grooms arrive alone, and the Honesty Box turns up the heat

Important decisions lie ahead at the Commitment Ceremony... who will stay or leave?

Two new couples get wed... sparks fly for some, but there's second thot for others.

The final two couples in the experiment set off on their honeymoons.

It's the third dinner party, and newcomers are about to crash the party...

The experts deliver some tough truths to help the couples progress on their journey

It's Love/Hate week for the couples. Can they improve their honesty and communication?

It's the Couple's Retreat and as old feuds are reignited, a connection forms between a bride and groom... who aren't married to each other!

The drama of the Couple's Retreat continues, as marriages hit the rocks and one bride's worst fears are realised as a bombshell is dropped at the dinner party.

It's the penultimate Commitment Ceremony and the experts assess the fallout from the Couple's Retreat. But a huge curveball arises, leaving the experts stumped.

It's the all-important homestays and one half of the couple get a glimpse of their future in the outside world, with some serious grillings from the in-laws.

Celebrations at the dinner party are cut short as the Anonymous Letters assignment brings to light some uncomfortable observations for the couples. And a shocking confession from Jordan leaves Chanita with serious doubts about their future.

Thomas and the bridges head off on their homestays, where Jordan gets a grilling, Zoe and Jenna struggle to decide where they would live in the outisde world, and Adrian hears some harsh feedback from Thomas' mum and dad.

At Kasia's homestay, Kwame's in for a shock when he comes face-to-face with her lotal sisters. Back in London, the L-bomb gets dropped, and on a night out, an ongoing fued comes to an explosive conclusion.

It's the last Commitment Ceremony, and while some relationships are solid, others are shaky. All of the participants must make the most improtant decision to date: agree to go to the Vow Renewal Ceremony, or call quits on their marriage.

The couples go on their final dates... will any cracks in their marriages be put under added pressure? Difficult decisions lie ahead and there's a crisis on the cards for one husband and wife.

It's the last dinner party for the couples. The honesty box game unveils some uncomfortable truths, and Thomas and Adrian make a shock announcement.

With final vows fast approaching, tensions rise as the most important decision awaits. Who will commit to a future together and who will walk away for good?

It's time for the vow renewals and as one couple commit to spending their future together, the fate of two others hangs in the balance...

All of the couples reunite for the final ever dinner party. The experts watch on as the honesty box sets off a disagreement that ends the evening with a bang.

The couples face the experts one last time, as they reflect on their experience in the experiment and their futures. But for some, the drama continues to unfold.

It's back! Sixteen new singletons, who are looking for love, marry strangers. The brides and grooms celebrate their last night of freedom and the weddings begin.

Four more singletons enter the experiment, for two more magical weddings. One has a fairy-tale feel, but the other turns into an awkward affair.

Our first set of newly-weds jet off on their honeymoons to start married life. Will early buds of love blossom on the beach or will the sun set early on romance?

Wedding bells chime once more, as new couples meet each other for the first time at the altar. While one couple have an instant, electric connection, another bride puts absolutely everything on the line.

Four more single people agree to marry a stranger. While one couple believe their match was written in the stars, the other pair discover that they have worryingly different lifestyles.

The remaining newly-weds head off across the world to enjoy luxurious honeymoons. For some, feelings flourish in the tropical climes, but others start to feel the heat of their marriages, which pushes one couple to breaking point.

The next phase of the experiment begins, as the newly-weds move into their apartments and come together for the very first dinner party. But events take a dramatic turn when emotions run high for the couples who are struggling to find marital bliss.

The couples face the experts at their very first Commitment Ceremony, where they must make a critical decision: whether to stay in the process and continue working on their relationships, or choose to walk away from their marriages for good.

A new chapter begins for all of our newly-weds as the first task of the series is set. Confessions Week is designed by the experts to help the couples open up to each other, but brutal feedback could knock the group's golden couple off their perch.

It's the second Dinner Party and the couples come together to eat, drink and open the Honesty Box. Some pairings face uncomfortable truths, and continued scrutiny starts to take its toll on one couple in particular.

Mel, Charlene and Paul bring everyone to the couch for the second Commitment Ceremony. Being under the microscope cements some couples' happiness, but for others, the decision of whether to stay or leave the process altogether remains a tough choice.

Four more singles looking for love take the ultimate gamble and join the experiment. Two more weddings lie ahead, but one picky bride has a lot to say about her groom, and an initial lack of spark threatens to overshadow the other couple's happy day.

It's honeymoon time for our freshest newly-weds and Intimacy Week for everyone else. For some it highlights the challenges ahead, while others jump straight in.

The two newest couples return from honeymoon and make a surprise entrance at the third dinner party. But their arrival is overshadowed by rising tensions among the group, as friendships break down and a feud erupts over the dinner table.

The group face the experts on the couch once more at the third Commitment Ceremony. For some, it's an opportunity to celebrate their successes, while others must confront hard truths.

The husbands and wives spend time apart on group days out. But any hopes of bonding quickly unravel, as sparks fly between two brides and uncomfortable questions reveal some big surprises and send shockwaves through the group.

Wedding bells ring again as another couple step into the unknown and join the experiment. Back at the apartments, the married couples open the door to some familiar faces during In-laws Week.

In-laws Week continues, and while home truths give hope to some, chatting with loved ones sends one couple on a downwards spiral. And two grooms tie the knot, but an unexpected twist threatens to ruin the whole celebration.

The final batch of newly-weds head off on their honeymoons, but it's not long before they hit bumps in the road. And In-Laws Week continues, driving one marriage towards breaking point.

The newest couples in the experiment return from honeymoon and unite with the rest of the group. But it's not the welcome they were expecting, as a shock revelation derails the entire evening in the most dramatic dinner party yet.

It's time for the fourth Commitment Ceremony. While some couple celebrate success, others must tackle fundamental issues in their marriages. And under the scruituny of the experst, a bride and groom must face the consequences of their actions.

The couples are tasked with sharing what they like and don't like about each other in Love/Hate Week. While some of them open their hearts, others face brutal criticism. And a video from the past makes one marriage plummet to an all-time low.

The couples head off for a country retreat and spend time apart on girls' and boys' days. Frictions quickly builds between two grooms, while honest opinions upset one bride. And neither group is prepared for the biggest shock of the experiment so far.

On the second day of the couples' retreat, the group reunite for a dinner party. Revelations from the previous day are brought to a head at the table, leading one bride to hit back at the group and throwing another's marriage into turmoil.

Its the penultimate Commitment Ceremony for the couples. Some of the marriages have reached new heights, but others could be nearing the end of the line. And, after shocking scenes, the experts must make a decision that has dramatic consequences.

Following an emotional Commitment Ceremont, the remaining couples face the most challenging task of the series so far: Partner Swap Week. One couple hit a low point, while another groom is left questioning the future of his marriage.

The penultimate dinner party serves up an extra helping of drama, as the anonymous letters force the group to face some uncomfortable truths. And a clash over communication leads to an explosive confrontation between one couple.

The homestays get underway, giving the brides and grooms a taste of life outside the confines of the experiment. But the trip home fails to solve one couple's troubles, and a groom is reunited with some less than friendly faces.

The Homestays continue as the couples try to fit into each other's lives. Some form deeper and stronger connections with their partners, but real-world pressures could be too much for one couple.

After a dramatic round of homestays, it's time for the remaining couples to face their final Commitment Ceremony and garder advice from the experts. While some couples are happy with their progress, others aren't faring as well.

The stakes are high as the remaining couples set off on their final dates. Some of them use the time to reflect and plan their lives outside of the experiment, but for others, the dates serve only to intensify the questions hanging over their future.

It's the final Dinner Party and the last chance for the remaining couples to gather advice from each other before their Vow Renewals. It's an eventful evening, thanks to the daunting return of the Honesty Box, which prompts some shocking truths.

It's Vow Renewals time, and after seeking advice from their nearest and dearest, our couples decide whether or not to embark on their happily ever afters.

At the final Vow Renewals, our last remaining couples decide whether to give their relationships a go outside the experiment, or to walk away for good.

The group reunite for one final dinner party. Old feuds flare up and a shocking rumour is revealed, but which marriages have flourished and which have failed?

In the final reunion ceremony, the group look back on their time in the experiment. And can the experts help one marriage hanging in the balance?

In this extended opening episode, the brides and grooms enjoy one last night of freedom at their stag and hen parties. The drama kicks off early when one groom's controversial opinion leaves everyone questioning whether he's there for the right reasons.

Four more singles enter the experiment, and there's an instant and undeniable attraction for one couple, but could another bride's dreams of a fairytale wedding be crushed when her groom makes the ultimate wedding day blunder?

The first four couples embark on romantic honeymoons, giving them the first opportunity to really get to know each other after the extraordinary excitement of their wedding days.

Two more couples take the ultimate leap of faith, and one couple discover they have an immediate connection, but will the bride's traditional values put a dampener on their wedding night?

The last four singles finally get to walk down the aisle, but an overcurious bride with a long list of questions might prove too much for one groom to handle.

Our last newly-wed couples jet off on their honeymoons. Love blossoms for some but others begin to feel the strain, and one bride is pushed to breaking point.

The newlyweds settle into their new homes and come together for their first dinner party, but one groom's behaviour shocks the group and forces his wife to question her new husband.

The couples face the experts at their first Commitment Ceremony, and while some take the opportunity to celebrate, others must make a life-changing decision.

Experts Week sees Mel, Paul and Charlene set exercises specifically designed to strengthen and develop each couple's marriage. However, an ill-judged honeymoon comment comes back to haunt one groom, while the challenge of facing uncomfortable truths proves too much for a marriage that's already on the rocks.

The couples take their seats at the second dinner party. One partner is left wondering if their spouse will even show up, while the honesty box exposes cracks in another marriage. However, rumours about one bride's behaviour behind closed doors spark the biggest conflict of the evening.

Mel, Charlene and Paul invite the couples to the couch for the second Commitment Ceremony of the experiment. Some reflect on a positive week, but others struggle to overcome feelings of betrayal. Another marriage is rocked by a lack of attraction, forcing them to face the tough decision of whether to stay and work at their marriage, or leave the process - and each other - for good.

It's the start of In-Laws Week, and a careless comment leaves one wife's mother in tears when the family come to visit. Plus, a brand-new couple join the experiment! Hoping to find her fairy-tale happy-ever-after, a new bride is in search of her very own Prince Charming - but will his grand efforts to woo her succeed?

As two new singles meet and marry at the altar, a bride hopes to find a man who can handle her, while her groom prepares to drop a bombshell of a revelation.

More of the married couples' loved ones visit for In-Laws Week, but one husband receives a damning review, while another new pair join the search for love.

The fresh batch of newlyweds jet off on glamorous honeymoons and while it's all sunshine and smiles for some, a huge breach of trust leaves one couple's marriage in the balance.

The three new couples make a surprise entrance at the dinner party, sparking friction between one husband and wife.

At the Commitment Ceremony, some marriages flourish, but others begin to wither in front of the group. Will anyone decide to walk away from the experiment, and their partner, for good?

The couples head off for a relaxing countryside retreat, but rumours start to swirl about one of the women, who finds herself at the eye of a storm.

On the second day of the retreat, the husbands and wives spend time apart on separate group days out, but things turn sour when several of the women confront another bride.

The couples mark their final day at the retreat with a dinner party, but events from the previous days out have led to friction within the group and trouble among some of the pairs.

The couples come together with the experts at the Commitment Ceremony. While love is in the air for some, a shock revelation sends the group reeling, putting more than one marriage on the line and leading to a tense, nail-biting showdown in the most dramatic ceremony of the series.

It's Love/Hate Week, and the experts challenge the couples to list what they like and don't like about each other. While some grow stronger, others struggle.

The newlyweds head off on days out, but rest and relaxation are the last things on their minds. Things get spicy on the dance floor and steamy in the hot tub, as a potentially compromising photo stirs up trouble. Plus, a blindsided groom is ambushed by two brides who are determined to give him a piece of their minds.

It's Dinner Party time, and the aftermath of the big days out creates tension. Two husbands clash when one of them tries to defend his wife's honour, and a dinner table disagreement sends another couple on a downward spiral. However, it's a surprise arrival that delivers the biggest shock of the evening.

Mel, Paul and Charlene offer their expertise at the penultimate Commitment Ceremony, with one couple having to confront difficult truths as their future is called into question.

Following an emotional Commitment Ceremony, the remaining couples face the most challenging task of the series so far - Partner Swap Week.

The penultimate Dinner Party packs an emotional punch when anonymous letters compel every couple to face their problems head-on, and tensions rise as two of the group clash.

The homestays get underway, and while one couple get an unexpectedly warm welcome from the mother-in-law, it's far from home-sweet-home for another husband and wife.

The problems between one husband and wife worsen, close family ties put strain on another marriage, and probing questions from friends lead to an explosive argument.

Following an eventful time at homestays, the remaining couples face the final Commitment Ceremony, seeking guidance from the experts one last time.

It's a crucial moment for the remaining couples as they embark on their final dates, which offer a chance to reflect on their journey through the experiment.

The couples spend time apart on boys' and girls' nights out, as they welcome back the husbands and wives who have left the experiment.

The remaining couples gather for their last dinner party together and when allegations and accusations start to fly, one couple reach breaking point.

As the experiment draws to a close, the remaining couples move out of the apartments and prepare for Vow Renewals.

The group reunite for the first time since the experiment ended for one final dinner party, where they find out which marriages have flourished in the outside world and which ones didn't withstand the pressure.

Series nine concludes with the final Reunion Ceremony, a last chance for the group to meet with experts and look back on their time in the experiment.