Yesterday’s episode of the ITV soap saw a menacing figure standing outside the house of the vet (played by Zoe Henry).
It was thought that the shady figure was Pierce Harris (Jonathan Wrather), who has become estranged from his wife following his repeated rape and abuse of her.
However, it turned out that the villain was away in Amsterdam on business with his colleagues and had an alibi that meant it could never have been him.
The revelation left viewers scratching their heads but it was not long before the identity of the mystery stalker was unveiled, which turned out to be Martha (Elaine Claxton), his mother.
She made her first appearance in Emmerdale a couple of months ago as the evil lawyer as Rhona got ready to tie the knot. During those scenes, she hinted that Pierce was harbouring a dark secret in his past that was set to come out.
Now it looks like Martha is well and truly back in the picture as she was seen creeping around Rhona’s house in the dead of night.
But why is she back in the village and why is she stalking Rhona? Is she trying to protect her rapist son using the most sick and twisted means?
Speaking about the storyline, soap star Jonathan, 48, told Digital Spy: “Pierce’s mother Martha has been introduced and she’s harbouring some secret, but we don’t know to what extent.”
He went on to say: “She’s coming back into the show and she is so charming and so nice. There’s something slightly mysterious about it. We don’t know what her secret is yet.
“It could be something very big – it could be something similar he’s done in the past, or it could be something else.
“So do we believe what Martha said, or do we believe Pierce?”