Sally (Sally Dynevor) uncovers the truth after attending Frank's funeral, where Anne, Carla, Maria and Michelle are among those who gather for the service.
Later, when Sally stumbles upon evidence which points to the guilty party, Frank's killer is backed into a corner and finally reveals the truth.
Taking in the full horror of the crime, Sally fears for her safety and tries to run.
However, as the killer makes a dramatic bid for freedom, Sally ends up lying unconscious. Will she be okay?
Coronation Street airs these scenes on Monday, March 19 at 7.30pm on ITV1.
> Coronation Street poll: Who killed Frank Foster?
> Coronation Street Andrew Lancel teases Frank Foster killer reveal
> Coronation Street Kym Marsh: 'Michelle could have killed Frank'
> Coronation Street fans expect Frank Foster killer twist
> Coronation Street Alison King interview: Is Carla Connor a killer?
> Read more Coronation Street news and spoilers
Over on EastEnders, heartbreaking scenes lie ahead as Shirley Carter is left devastated by the death of her best friend Heather Trott.
As first reported some time ago, Heather meets a tragic end later this month as Ben Mitchell kills her during a furious showdown at her flat.
The drama begins when DCI Marsden is given cause to question Ben's statement regarding Stella's death, which leads to the troubled teen being charged with perverting the course of justice. Phil's release is then immediately ordered as the case against him has fallen apart.
As Ben wonders who informed Marsden of his deceit, Heather is at the top of his suspect list - so he storms round to her flat to furiously confront her. Jay soon arrives to calm things, but the situation escalates as Ben starts ransacking Heather's home - looking for the money that Dot gave to her so that he can use it to run away before Phil arrives back.
When Heather tries to stop Ben, he lashes out in a moment of fear and desperation - grabbing a picture frame and hitting her hard over the back of the head with it. As Heather falls backwards, she hits her head on the kitchen worktop - and Ben and Jay are horrified to see that she is dead.
A sickened Phil (Steve McFadden) later helps Ben to cover up the crime, faking a burglary at Heather's flat, destroying evidence and leaving the scene.
Later, when Shirley (Linda Henry) finds Heather dead at the flat, she's distraught - and it's Phil who's left to comfort her, feeling torn by what he knows. Can Phil, Jay and Ben maintain their momentous lie?
EastEnders airs these scenes on Wednesday, March 21 at 7.30pm on BBC One.
> EastEnders exit for Cheryl Fergison
> EastEnders Heather Trott exit storyline revealed
> EastEnders murder details revealed
> EastEnders murder aftermath revealed
> Read more EastEnders spoilers and news
Coming up in Emmerdale, Adam Barton commits arson in a shocking act of revenge against Cain Dingle.
Adam (Adam Thomas) grows increasingly resentful of Cain in the coming days, and is particularly disgusted when his family members start thanking the bad boy for saving Holly's life after she suffered a heroin overdose.
When Adam confronts Cain (Jeff Hordley) at the garage later this month, a heated argument follows and Adam ends up throwing a petrol canister at the mechanic's injured leg, causing petrol to leak everywhere.
Cain is in agony and feels powerless when Adam knocks more flammable liquid onto the floor. In a moment of madness, Adam picks up the blowtorch and declares that it's time for Cain to beg for forgiveness.
Adam then totally loses control as he throws down the blowtorch, igniting a fire. He hesitates for a split second, before leaving Cain locked inside the garage as the flames spread…
Emmerdale airs these scenes on Thursday, March 22 at 7pm on ITV1.
> Emmerdale arson plot: Full details revealed
> Read more Emmerdale spoilers and news
Meanwhile, Hollyoaks fans can expect fireworks on the day of baby Bobby's christening later this month.
Riley (Rob Norbury) begins to feel guilty over his cold behaviour towards Mercedes (Jennifer Metcalfe) in upcoming episodes, so he suggests that they should all come together and put their differences aside in time for Bobby's big day. He also asks Mercedes to babysit Bobby while he heads out to an awards ceremony.
Mercedes reads too much into Riley's gesture and is given renewed hope of a future with the footballer. However, it seems that she's heading for disappointment as Riley is out with Mitzeee (Rachel Shenton) that night and the pair share a cosy moment - which is captured by a paparazzo!
The next day, incriminating pictures of Riley and Mitzeee appear in the press, which results in all hell breaking loose at the christening.
As Mercedes violently lashes out at Mitzeee, Riley is left to wonder whether he's pushed his ex-fiancée too far…
Hollyoaks airs these scenes on Wednesday, March 21 and Thursday, March 22 at 6.30pm on Channel 4.
> Hollyoaks' Riley stays close to Mitzeee, says Rob Norbury
> Read more Hollyoaks spoilers and news
Over on Doctors, Freya Wilson has a tough few days ahead as she faces an online backlash and suffers an unexpected career setback.
Freya (Lu Corfield) will soon be left gutted when Immie (Charlie Clemmow) points out that some horrible comments have been posted on her blog, which leaves her to wonder whether she should shut it down. However, Mandy (Danielle Henry) encourages her girlfriend to stand up for freedom of speech.
The next day, Freya has more than her blog to worry about when Zara (Elisabeth Dermot Walsh) discovers that she is behind on her paperwork. No-nonsense Zara wastes no time in warning Freya that she's spending too much time blogging and not enough on her work.
Freya promises to change her ways, but it seems that the damage has already been done when results day arrives and she discovers that she has failed her exams. With Mandy by her side, can Freya get through this?
Doctors airs these scenes on Monday, March 19, Tuesday, March 20 and Thursday, March 22 at 1.45pm on BBC One.
> Doctors star Lu Corfield chats to Digital Spy about Freya's new storylines
> Read more Doctors spoilers and news
Hollyoaks was the winner of our storyline poll last week as 40.6% of you chose George and Phoebe's ordeal as the best plot.
Coronation Street came second with 33.1% for Carla and Michelle destroying evidence, while Emmerdale was third with 15.9% for Cain coming to Holly's rescue.
EastEnders took fourth with 8.4% for Shirley's visit to Phil in prison, while Doctors was fifth with 2.0% as Julia took drastic action.
Don't forget to vote in the poll below and let us know which story sounds best this week!