EastEnders’ Nicola Mitchell is terrified next week when Teddy threatens to expose her sinister past to Harry.

But instead of revealing her killer secret, Teddy ends up taking matters into his own hands – with shocking results…

“The truth is out,” begins our EastEnders insider. “Nicola was forced to confess to Teddy that she killed Harry’s ex-girlfriend Shireen, only because her body is buried on the site of her husband’s new building project. Now Teddy holds all the cards and Nicola is nervous, but things don’t quite play out as she thought they would.”

Reeling Teddy wants answers from his wife about exactly what happened to Shireen. The girl went missing four years ago, and Harry was accused of murdering her as the pair had a notoriously volatile romance before she vanished.

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However, Nicola killed Shireen herself and concealed her crime by having the corpse buried on an industrial estate. Excavation work is about to begin on Shireen’s resting place, and with the net closing in, Teddy reckons they need to come clean to Harry so he can stop torturing himself about his ex’s unknown fate.

Nicola fears her son wouldn’t be able to cope with the terrible truth and convinces Ted to stay schtum, but this doesn’t stop Barney suspecting his parents are hiding something.

With the diggers cranking up at Paradise Park, Teddy has a brainwave and tells Nicola he has a plan to get them out of this mess. What does he have in mind?

“Nicola didn’t work alone,” our source reminds us. “She paid a man called Benji to handle the disposing of Shireen’s corpse, so she and Teddy arrange to meet him hoping to do a deal that ultimately benefits everyone involved. The question is, will Benji go for it?”

It appears so, as following their clandestine meeting and hard negotiation, Nicola makes plans to sell Harry’s Barn to pay Benji for helping her out of this sticky situation.

Sensing his spouse’s disappointment in having to flog her business, Teddy works out another solution to their predicament and swings into action. However, Nicola isn’t pleased that he has got involved.

“Teddy’s taken control, leaving Nicola narked that he might’ve made things worse,” reveals our insider. “There are huge consequences from Teddy’s actions, which plunges the Mitchells into some very dangerous territory.

“While pondering her next move alone at Harry’s Barn, Nicola gets the fright of her life when an intruder makes their presence known. They have some questions, and won’t leave until Nicola explains herself.”

Who is the mystery visitor, and what do they know? Is it a relative of Shireen’s who’s stumbled on some information, or has someone else rumbled her?