Emmerdale dropped a twist on viewers this week, as the search for missing Jamie Tate led to a surprise.
Fans know that Jamie faked his death in September, and has been staying with his former mother-in-law Hazel, and his daughter Millie.
Millie's mother, and Hazel's daughter, Andrea Tate was murdered by Meena Jutla in October, and Millie has been staying with her grandmother ever since.
But now it appears tragic Andrea may have had a sibling despite it never seeming to be revealed on the ITV soap - amid Jamie remaining on the run.
A few months ago, Jamie's fate was exposed by Gabby Thomas, the mother of his baby son Thomas, and his ex Dawn Taylor.
They still have no concrete proof of him being alive, and after Will Taylor learned of the possibility, he hired an investigator to find him.
Mike asked Will to do a DNA test, to compare baby Thomas' DNA to the person they had found - with the person appearing to look like Jamie.
The shady investigator charged £3,000 for the results, only for them to reveal the man couldn't have been Jamie, as they didn't match the DNA of baby Thomas.
Mike soon revealed that the mystery man was the son of Hazel's ex, while it wasn't clear if they were Hazel's son too.
Either way, this would mean Andrea had a brother or a stepbrother, but she had been estranged with Hazel so perhaps they never even met.
Details on who the character is have not been confirmed, other than the fact they're mixed up in drugs, but fans are convinced there has to be some relevance.
As many questioned if they would be making a village arrival, others guessed they might already be on the show.
One name came up a few times too, with them guessing new drug dealer Jason could be the secret brother.
Taking to Twitter, one viewer predicted: "ooooo So Andrea had a brother? Watch it be Marcus, Jordan or that Drug guy who's dueling Leyla hahaha."
Another agreed: "Theory: Andreas brother is the guy who sold Leyla the drugs last week. Because why else bring it up."
Got any theories or thoughts on the storyline? Let us know in the comments section below
Emmerdale airs weeknights at 7:30pm on ITV, with an hour-long episode on Thursdays.
