Caleb Milligan will catch Nicky out on Emmerdale next week - amid a bombshell DNA twist theory.
Fans have been speculating on what secret Caleb might have after he arrived in the Dales to visit Cain in prison. Caleb and Cain fell out years ago but he returned to quiz his sibling about their mum's Faith recent death.
However, some viewers are convinced all isn't what it seems with Caleb, with some convinced he could be related to the likes of Nicky, the Tates or some are sure he's an undercover police officer. Bosses have confirmed all is not what it seems with Caleb but have so far ruled out just one theory about his identity, with fans suggesting plenty more.
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Next week on the ITV soap, things seem to continue to blossom between Gabby and Nicky as they prepare to spend the day together, before nearly being caught by Dawn. As Nicky's contract is up for renewal, Kim has to decide whether to keep him on, as she sits down with Gabby and Dawn to discuss what they should do about Nicky.
Kim decides to make Nicky permanent and when they're alone, Gabby and Nicky head upstairs to celebrate. There is more celebrating the next day as things get made official, but when Gabby is suddenly hit with a wave of nausea, she is left relieved that Nicky looks after her, cementing that their relationship seems to be going in a serious direction.
With a free house, the pair quickly get hot and heavy - but they are soon interrupted by the arrival of Caleb. As he catches them red-handed, Gabby desperately tries to defend the situation - but has she said enough?
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Bosses have kept tight lipped about Caleb's identity, refusing to reveal what his secret is.
Speaking in a video on the soap's YouTube page, executive producer Jane Hudson explained: "I think the other storyline that the viewers are absolutely going to love is Cain and Caleb. What's Caleb's involvement with Cain?
"Does he really want to be Cain's brother or has he got other ulterior motives? I think that's a fascinating dynamic to watch – and whenever we have Home Farm and the villagers coming together in a story, it's just not going to end well at all."
Caleb has been working with Kim Tate to help organise a horse breeding programme at Home Farm, but is his motive just to make money, or is there something else more sinister he is planning?