Emmerdale released a video teaser for Earth Hour at the weekend, showing the residents of the Dales in the day.
Emmerdale cast members Kim Tate (Claire King) and Graham Foster (Andrew Scarborough) playing an intense game of chess as the lights come on.
Bernice Blackstock (Samantha Giles) and Liam Cavanagh (Jonny McPherson) are seen in bed together, bursting into giggles as they suddenly sit up.
Meanwhile at Tug Ghyll, the women enjoy some time to work out, read, and drink wine at home.
But at the end of the trailer, a mystery person is seen standing in the Woolpack as he stares into the camera.
Fans are desperate to find out who he is, and some think they may have worked it out.
One viewer posted on social media: “It’s Ed isn’t it? He’s gonna try and get Aaron back eh?”
Another added: “The guy at the end of this video, could it be Ed?, is this going to be the new Robron story, just asking.
A third chipped in: “I don’t want it to be Ed, Robert is the only one for Aaron.”
A fourth wrote: “If that new bloke isn’t connected to Aaron’s story I don’t give a toss. I want Aaron!”
Ed was a former flame of Aaron’s, and was last seen on the soap in 2012.
Could he be returning to the soap to get back together with Aaron and split him up from Robert Sugden?
The pair have been on rocky ground recently, but this could be the final straw for them…
Emmerdale continues tonight at 7pm on ITV.