Emmerdale spoilers follow.
Emmerdale's Caleb Miligan edges towards a chilling discovery next week as he uncovers shocking clues that could expose Joe Tate's secret.
When Joe returns to the village, the stage is set for a colossal showdown as he and Caleb both become deeply suspicious of each other. With hidden scandals at risk of exposure, who'll get the upper hand is anyone's guess.
The trouble all kicks off when Joe spots Caleb and his wife Ruby behaving strangely in the woods, where John Sugden recently claimed to have buried Anthony Fox's body.
Sensing trouble, Joe starts to seek answers about what Caleb and Ruby are hiding.
Related: Emmerdale reveals Joe Tate's dramatic return in 20 spoiler pictures
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"Joe should probably be keeping a low profile after everything he's been up to recently, but he risks Caleb's wrath by starting to dig for dirt," our Emmerdale source teases.
"Although Joe comes back to the village to win back Dawn, he can't help getting distracted when it's obvious that Caleb and Ruby are up to something. Could a new battle be brewing?"
Worried that Joe's digging could bring their house of cards crashing down, Caleb and Ruby decide to invite him over for lunch. What they don't realise is that Joe has a dark secret of his own, having illegally performed a kidney transplant on his uncle.
Joe panics when he realises he's left his coat at Caleb's – with his pills inside his pocket. When Steph hands the jacket back over, Caleb's intrigued to catch his nephew trying to hide the medication, and his mind starts whirring.
Related: Emmerdale meltdown sparks doubts over Anthony Fox's death
Desperate for more intel, he tears out a light fitting at the factory, then calls Noah round to fix it. As Joe's half-brother diligently works away, Caleb subtly grills him – and is horrified by what he hears.
Our insider adds: "Noah lets slip that when he was hallucinating after his spiking, he was in a hospital and saw Joe.
"It all sounds very fishy to Caleb and he starts to wonder whether there could be a bigger secret at play here."
As Caleb vows to do more investigating into Joe's affairs, will he find out the horrifying truth about the kidney transplant? And how close is Joe to any answers over Caleb and Ruby's shifty behaviour?
Emmerdale airs on weeknights at 7.30pm on ITV1, and streams on ITVX.
