Emmerdale fans have been struggling to trust Caleb Milligan since he arrived in the village on Christmas Day.
Caleb was introduced as the long lost brother of Cain and Chas Dingle and quickly integrated himself back into his family, making it his mission to get Cain out of prison who was serving time to protect his son, Kyle.
His true motives have been regularly debated by fans, and they were only more intrigued after Emmerdale bosses confirmed the character is hiding something.
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Discussing the relationship between Caleb and Cain, executive producer Jane Hudson revealed things between them won't end well as she teased Caleb's true motives as a brother.
"I think the other storyline that the viewers are absolutely going to love is Cain and Caleb. What's Caleb's involvement with Cain?," Jane said in a video on the soap's YouTube page.
"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."
Another theory surrounding Caleb, played by Waterloo Road star Will Ash, is that he is related to drug dealer Alex Moore who recently returned to the village after months in prison.
As he reaffirmed his place amongst the residents, fans noted he has a slight resemblance to Caleb, suggesting the two could be related somehow.
"Alex looks similar to Caleb #emmerdale," pointed out one viewer.
"I’m wondering if Caleb has connections to Alex the dad of the kids and Dawns ex," echoed a second.
Someone else added on Reddit: "Is it just me or does Caleb look like Alex?"
Other theories put forward by fans include him being an undercover police officer or that he is related to past and present village residents such as Kim Tate and DI Mark Malone.
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