Bobby Beale (Clay Milner Russell) has struggled to adjust to life outside of prison and still feels guilty over the death of Lucy Beale (Hetti Bywater).
Fans have seen him experience visions of his sister in recent weeks, and they are set to return again this week.
He became responsible for her death in 2014 when he hit her with a jewellery box, and he was eventually found-out and sent to prison.
Now that he is trying to get his life back on track the visions of her keep coming back to him.
Is Hetti Bywater back as Lucy Beale in EastEnders?
Lucy Beale is set to appear in front of Bobby Beale once again as he is plagued by more visions.
The bad news for fans of the soap is that her appearance in tonights episode doesnt include the return of Hetti Bywater.
Instead, Bobbys visions include old dialogue from the actress as well as flashbacks from when she was alive.
Bobby has seen a figure of Lucy by his window over the last few weeks, but the role is played by a body double rather than Lucy herself.
Viewers only see the outline of her from afar, but to Bobby what he sees is very real.
Tonights visions are set to push Bobby over the edge, and he could be about to take drastic and dangerous action.
EastEnders airs tonight at 20.00 on BBC One.
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