After two years away, Lisa Fowler (played by Lucy Benjamin) returns to Albert Square to ask for help from her best friend Mel Owen (Tamzin Outhwaite).
Mel is currently trying to cope with the sudden arrival of her fugitive son, Hunter Owen (Charlie Winter) who is on the run from the police.
When Mel sees Lisa she’s pleased to see her friend but is concerned by what she has to say.
Lisa’s daughter, Louise Mitchell (Tilly Keeper) and Keanu Taylor (Danny Walters) fled Walford earlier this month.
Now, Lisa has suddenly arrived in the Square and wants Mel’s help to get Keanu out of the country.
However, it isn’t long before news of her arrival spreads and Phil Mitchell (Steve McFadden) wants answers.
Phil and Lisa have famously rocky history as the timid market inspector suffered a breakdown because of her relationship with the Mitchell hard man.
In 2001, Lisa was revealed as the person who pulled the trigger in the infamous storyline ‘Who Shot Phil?’
But with Lisa back on the scene without Louise in sight, could she be about to deliver some hard home truths to Phil?
In teaser images, Phil can be seen confronting Lisa as to the real reason she’s back in Walford.
Does Lisa know where Louise is hiding, and will she tell Phil the truth?
Meanwhile the latest trailer dropped by EastEnders suggests Hunter may be about to kill again.
The clip teases at an explosive week for the Walford residents as Whitney Dean (Shona McGarty) and Callum Highway (Tony Clay) prepare for their wedding.
Hunter has come home to seek help from mum Mel but it looks like he might have unfinished business on the Square.
In the clip, Hunter breaks into Denise Fox’s (Diane Parish) house.
Hunter takes Denise by surprise and it’s obvious he has something to get off his chest.
Later in the clip, an unknown assailant is seen handling a gun.
The young fugitive has made it clear how angry he is at Jack Branning (Scott Malsen) for the role he played in his arrest.
Despite Denise calling things off between the pair, Jack still cares for his former partner.
Could Hunter be planning on killing Denise to get revenge on Jack?
EastEnders returns Monday at 8pm on BBC One.