Emmerdale viewers think they have worked out Cathy Hope's new storyline, which is said to have not been covered by a soap before.
The teenager will take centre stage in 2023, as part of an "emotional" and "challenging" plot.
Few details have been revealed about the plot and what it means for Cathy, while viewers have seen her appearing to struggle recently.
While it could have been her missing her pal April Windsor after their row, the character seemed emotional and isolated.
Recently, soap producer Jane Hudson told The Mirror and other press that the younger characters all had huge scenes ahead next year.
Cathy will get her first big storyline, and it's said to be "really emotional" and one that "parents will connect with".
She spilled earlier this month: "A lot of the youngsters have big stories coming up. You’ll see a really big story for Cathy, Bob's daughter, which is really emotional.
"It's her first big story and a challenging one, and I think one a lot of parents will connect with and one I haven't seen a soap do before so Cathy has a big story coming up."
Jane then joked that the soap first might end up having been done before by a different soap years ago knowing her luck, after being sure she had never seen it on a soap before now.
Viewers have begun to speculate what the storyline is, with many guessing Cathy was switched at birth - and might not be Bob's real daughter.
This might not happen given Cathy actress Gabrielle Dowling is the real-life twin of her on-screen twin brother Heath Hope, played by Sebastian Dowling.
Also, this storyline has been done before on soaps, including Emmerdale, where babies have been swapped at birth or at some point - but it's whether the storyline has ever been done later down the line.
This is the case for Home and Away which saw one character learn her twin sister was not even related to her, and her real twin had been swapped at birth.
Viewers still think this could be on the cards though - while others guessed she and twin Heath might have different fathers.
"I bet it turns out Cathy isn’t Bob’s daughter or Heath’s twin and there was a mix-up at the hospital", one viewer penned online.
Another suggested: "There is actually a phenomenon where two twins can have different fathers."
"Because the whole swapped at birth thing has been done before, so perhaps Bob isn’t actually her real dad but he is Heath’s."
Others questioned if the teen may suffer an accident that could have life-changing consequences, or perhaps she will suffer from an illness.
Emmerdale airs weeknights at 7:30pm on ITV1 and ITVX, with an hour-long episode on Thursdays.
