Eastenders will air a shock twist during the wedding day of two Walford residents next week on the BBC soap.
Kathy Beale and husband-to-be Rocky's big day has finally arrived, and Rocky is hiding a secret from his bride - following his stag do.
However, that is the least of his worries after the shock return of a character threatens to ruin their day.
Rocky and Bobby are both left panicking after their decisions on the stag night, with Sonia urging Rocky to come clean to Kathy about what is going on.
Eventually, the groom confesses everything - leaving his partner Kathy devastated by his revelation, confessing she might not go through with it after more lies.
Rocky might have a chance to put things right, as Kathy's son Ben soon arrives to surprise her.
Rocky is stuck at the registry office, while he has no idea whether Kathy will leave him at the altar or not.
However, a huge shock is ahead as a character returns leading to revenge.
Things take a nightmare turn when his estranged wife Jo arrives.
Kathy was shocked earlier this year to find out Rocky was still married to Jo, with them not getting a divorce.
Jo returned recently with the divorce papers, so what has brought her back this time?
Rocky reels over her arrival but he's stopped in his tracks as Kathy finally arrives to marry him. It's clear something is bothering him though, and Jo is up to no good.
Rocky’s heart is in his mouth as the registrar starts the ceremony, with Jo watching on as he and Kathy prepare to tie the knot.
What happens next leaves Rocky and Kathy facing the consequences of Jo’s vicious revenge.
But what has Jo done, and what does it mean for Rocky and Kathy? Viewers will have to tune in all next week to find out what goes down.
Kathy will feature in huge scenes later in the year, as a male character is killed off on Christmas Day.
Kathy and five other female characters were shown standing around a dead body in a clip that was aired in February - with it being a flashforward to the Christmas episode.
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