EASTENDERS fans spot clue proving who killed Harry Mitchell’s girlfriend Shireen – and it’s bad news for Walford.

The BBC soap threw a curveball this week as Jack Branning revealed Harry is suspected of murdering his missing girlfriend and that’s the reason the Mitchells moved to Walford.

Police detective Jack was trying to warn daughter Penny off Harry as well as stop Harry from blackmailing him with the assault footage.

But it backfired and Penny believed Harry’s explanation that they were a fiery couple but he didn’t do anything.

And fans agree – but they think they’v spotted proof of what actually happened – and it’s bad nws for Walford.

Instead of Harry killing Shireen, they think his soon to be arriving mother Nicola killed her – and dad Teddy covered it up.

One fan wrote: “Okay, I know who murdered Shireen. It was Nicola, and Teddy agreed to cover it up.

“There were two pieces of dialogue in this episode that gave it away.

“Firstly, in the scene where Harry and Penny were talking in the garage, Harry told Penny that the police thought he killed Shireen but nobody believed him ‘apart from his dad’.

“That meant that even people like Barney had doubts. But why would Teddy be so certain Harry didn’t do it? Because he knows who did do it.

“Secondly, in the scene where Barney and Teddy were talking about the Avani situation, Teddy said something like ‘why did you let Ravi off the hook and not tell the police? Did you think Avani would come running into your arms? Because I’m telling you, it doesn’t always work out like that.’

“I think this is implying that Teddy has been in a similar situation to Barney before, where he thinks keeping a secret from the police will bring the woman he loves into his arms.

“I think it will be revealed that Teddy and Nicola broke up a long time ago, but Teddy has always harboured a torch for her and wants to get back together (a little like Alfie and Kat).

“He found out that Nicola killed Shireen (for a reason that is not yet clear) and decided to keep it secret because he thought Nicola would realise she felt the same if he did.

“Unfortunately, that did not happen, and Nicola left the family again.

“Teddy is continuing to keep the secret because of his love for Nicola, but also because he knows that Harry will be *furious* with him if he finds out that Teddy knew the truth and didn’t tell anyone.”

Nicola Mitchell will soon arrive in Walford with actress Laura Doddington playing the role.