She’s back, and she’s on a mission.

EastEnders spoilers follow.

EastEnders has confirmed when Bianca Jackson will return to the show, as her suspicions grow about Reiss Colwell.

Bianca returned to Walford for a short stint earlier this year, but she fell out with daughter Whitney when she found out that her mum knew about Zack’s betrayal.

She stuck around after Whitney left the Square, but she made an enemy of Reiss and disapproved of him and Sonia using Debbie’s money to fund their IVF treatment.

In June, after falling out with Sonia, Bianca left Walford in tears. But a lot has changed since then, and Sonia is now in prison after being falsely charged with Debbie’s murder.

In scenes that will air on Monday, September 23, Debbie’s funeral arrives, and after a call from Sonia, Martin calls round to support Reiss.

But they are soon joined by Debbie’s parents Brenda and Hugh, who make it clear that Reiss is not welcome at the funeral.

Reiss begs them to change their mind, but the couple remain firm. Martin then decides to help Reiss mourn his wife by arranging a wake in The Vic.

Touched by this gesture, Reiss reads out his eulogy for Debbie in the pub – but at that moment, Bianca bursts in and demands answers.

As the week continues, Bianca interrogates Reiss about Sonia’s arrest back at the house, but Reiss gets overwhelmed and leaves.

Bianca then tries a much more direct approach and accuses Reiss of killing Debbie. It works, as Reiss nearly confesses, but Martin and Kat arrive before he can do so.

But Bianca is confident that Reiss is to blame for Debbie’s death, so she resorts to desperate measures to get to the truth.

Later, Reiss tells Martin about Bianca’s depression – which she was diagnosed with before she returned earlier this year.

Martin then finds Bianca in The Vic, and the pair have an honest conversation about her recent struggles.

Bianca spends the night at Kat’s flat, and Kat tells her that she needs to take responsibility for her actions and see the GP about her erratic behaviour.

She meets up with Martin again, but just ends up telling him again that she doesn’t trust Reiss.

Bianca decides to take Kat’s advice and see the GP, but she later cancels her appointment to attend Sonia’s fundraising event.