Under threat from Becky Swain, DI Costello finally confesses — just as Lisa’s dream wedding to Carla Connor crumbles into chaos.

For months, fans have been suspicious of Detective Inspector Costello, a shadowy figure who always seemed to know more than he let on. Since his arrival in August 2024,

played by Dan Brony, he’s moved through Coronation Street like a storm cloud — sometimes protective, often menacing, and always one step ahead.

But in the coming week, viewers will see his mask completely shatter, revealing a man whose obsession, deceit, and crimes run far deeper than anyone imagined.

It all begins as Lisa Swain’s long-awaited wedding begins to spiral out of control. Once a symbol of hope and healing after years of grief, the ceremony turns into a battlefield of secrets, lies, and betrayal. Ever since Lisa’s late wife Becky Swain suddenly resurfaced from the dead — alive, well, and living in Spain under a new name — Lisa’s world has been hanging by a thread. Her fiancée Carla Connor tried to hold their relationship together, but Becky’s shocking reappearance cracked open old wounds Lisa thought had long since healed.

Becky’s explanation was almost too wild to believe: she claimed she had been placed in witness protection following a disastrous undercover mission. Her “death,” she said, was a cover-up. But now, she’s back in Weatherfield — and she wants her family back. That includes Lisa… and their daughter, Betsy.

However, behind this emotional chaos is one man pulling every string — DI Costello. It was Costello who manipulated Lisa into therapy, claiming it was for her mental health after losing PC Craig Tinker. It was Costello who fed Carla Connor false information about a woman named Tia Wardley — another of his victims. And it was Costello who made sure Lisa never questioned the inconsistencies in Becky’s so-called death.

But his control is slipping fast. Becky’s return has exposed the cracks in his carefully built web of deceit. And when she refuses to disappear quietly, Costello’s desperation turns deadly.

A confrontation between Costello and Becky near the viaduct becomes one of the most chilling moments in recent Coronation Street history. Furious that Becky won’t return to Spain, he threatens her life, warning her she could “end up like Tia Wardley.” What he doesn’t realize is that Lisa’s loyal colleague, DC Kit Green, is watching from the shadows — recording every word.

The next day, Lisa visits Costello, unaware of the danger she’s walking into. She begs him to help her find a legal loophole to marry Carla despite the complications surrounding Becky’s return. Instead, he coldly orders her to “make Becky go back to Spain — to her death.” The command leaves Lisa shaken to her core. When she tells Carla the wedding might be delayed, Carla’s heartbreak turns to fury. The two women erupt in a fiery argument — Carla accusing Lisa of keeping her options open, Lisa unable to deny the unresolved emotions she still feels for Becky.

As their relationship implodes, Costello’s empire finally collapses. Kit Green steps forward with the evidence — a recording of Costello’s threats and confessions. Within hours, the once-respected detective is arrested. In custody, the pressure breaks him completely. Costello admits everything: he faked Becky’s death, silenced witnesses, and killed Tia Wardley to protect himself. His confession sends shockwaves through Weatherfield Police.

For Lisa, the revelation is soul-crushing. Every moment she trusted Costello, every word of advice, every “protective” gesture — all part of his manipulation. “You’re a monster,” she whispers when she confronts him. His chilling reply: “No, Lisa. I’m what this job made me.”

The fallout is immediate. Lisa is suspended from duty, her career in ruins. The woman who once stood for justice now finds herself broken, betrayed, and utterly lost. Betsy, furious and heartbroken, lashes out — blaming her mother for trusting the wrong people and destroying their family. Meanwhile, Carla retreats into silence, her love for Lisa overshadowed by mistrust and pain. The wedding dress remains untouched, a haunting symbol of everything that’s been lost.

Across town, Becky makes a dangerous decision. Despite her trauma, she agrees to meet Kit Green, determined to expose the wider network of corruption that Costello’s crimes were hiding. In a tense, late-night meeting, Kit reveals the horrifying truth: Costello’s operation ran deeper than anyone imagined. He used Becky’s “death” to launder money and eliminate witnesses who threatened to reveal the truth.

Becky realizes she was never a protected asset — she was a pawn. Collateral damage. And she refuses to be silenced any longer.

Later that night, Becky visits Lisa one last time. The two women share a heartbreaking, emotional conversation. Becky tells her everything — the cover-ups, the false reports, the murders. Lisa listens in silence, her face pale but resolute. “You don’t have to do this,” she says quietly. “You’ve already lost so much.” Becky’s reply is firm: “If I don’t, it’ll never end.”

As dawn rises over Weatherfield, Costello sits alone in a police cell, his career and conscience destroyed. Lisa stands outside the station, watching the sunrise, her badge heavy in her hand. She’s lost her wife, her fiancée, and her reputation — but she’s gained something far more dangerous: the truth.

When Becky appears outside the gates, the two women lock eyes. There are no words, only a lifetime of emotion between them. “It’s over,” Lisa whispers. Becky’s answer is haunting: “Not yet.” Then she turns and disappears into the morning fog.

Coronation Street fans can expect this storyline to explode into one of the most gripping climaxes in years. With Costello’s corruption exposed, new questions arise — who else was involved, and what secrets still lurk beneath the surface of Weatherfield’s police force?

For Lisa Swain, nothing will ever be the same again. Her family is fractured, her future uncertain, and her heart torn between two worlds — the justice she once believed in and the love she can’t forget.

As the dust settles, one thing is clear: DI Costello’s downfall is just the beginning. And in Coronation Street, the truth always comes at a devastating price.