Two People Fall to Their Deaths From a London Tower Block — Then a Police Officer Vanishes in ITV’s Gripping British Crime Thriller
Two people are dead after a mysterious fall from a London tower block. A young police officer and a five-year-old boy are found alive on the rooftop, but hours later, the officer disappears without explanation. What begins as a shocking tragedy becomes a deeply unsettling investigation in ITV’s acclaimed crime drama The Tower.
For viewers who enjoy British detective dramas filled with hidden motives, conflicting accounts and unexpected revelations, The Tower offers a compelling mystery that grows more complicated with every episode.
Starring Gemma Whelan and Tahirah Sharif, the series first premiered in 2021 and has since expanded to three seasons, with further investigations released in 2023 and 2024.
Based on Kate London’s Metropolitan novels, the drama explores the difficult realities of policing while placing its characters at the centre of disturbing and emotionally charged cases.
A Double Death and a Police Officer Who Disappears
The opening mystery begins with a horrifying incident at a tower block in south-east London.
A veteran police officer and a teenage Libyan refugee fall from the building and die.
On the rooftop, investigators discover two survivors: a young police constable named Lizzie Adama and a five-year-old boy.
Their presence raises immediate questions.
Why were two police officers and two children on the roof? What happened before the fatal falls? And what did the survivors witness?
Before detectives can establish the truth, the investigation takes another alarming turn.
Lizzie vanishes just hours after the incident.
Her disappearance transforms an already troubling case into a race to find a missing police officer while uncovering the circumstances surrounding two deaths.
A Determined Detective Faces an Increasingly Complicated Case
Gemma Whelan stars as Detective Sergeant Sarah Collins, the investigator tasked with understanding what happened at the tower block.
Sarah is methodical, determined and unwilling to accept easy explanations.
As she examines the evidence, it becomes increasingly clear that the events on the rooftop cannot be understood in isolation.
The investigation forces her to scrutinise the actions of fellow officers and confront uncomfortable questions about police conduct.
Meanwhile, finding Lizzie becomes urgent.
The missing constable may hold crucial information, but her unexplained disappearance creates another layer of uncertainty.
The tension comes not only from the search itself but also from the possibility that people connected to the investigation know more than they are admitting.
Three Seasons, Three Disturbing Investigations
The trailer offers a glimpse of the show’s tense atmosphere and the demanding investigations that await Sarah Collins in series three.
Although the opening season introduces Sarah Collins through the tower-block mystery, the following seasons expand the story.
The second season, The Tower II: Death Message, aired in 2023.
It explores two investigations involving violence against women, linking events from the past with dangers unfolding in the present.
Sarah and the returning characters face further professional and personal challenges as the cases develop.
The third season, released in 2024, is titled The Tower: Gallowstree Lane.
Set nearly two years after the preceding events, it follows the investigation into the fatal stabbing of a teenage boy.
The case becomes especially complicated when Sarah’s pursuit of the truth intersects with a major undercover police operation.
Each season introduces a distinct central mystery while continuing the development of the principal characters.
This approach gives viewers an ongoing detective story without relying on a single investigation throughout the entire series.
Gemma Whelan Delivers a Compelling Lead Performance
Gemma Whelan, known for her work in Game of Thrones and Killing Eve, anchors the drama as Sarah Collins.
Her performance combines professional determination with the pressures of a demanding police career.
Rather than portraying Sarah as an invincible investigator, the series presents a character who must navigate difficult decisions, institutional tensions and the consequences of her work.
To prepare for the role, Whelan spoke with author Kate London and consulted people with experience in policing.
She also learned practical aspects of police procedure while filming, including the proper handling of forensic clothing to avoid contaminating evidence.
Those details contribute to the show’s atmosphere of authenticity.
Tahirah Sharif provides another important performance as Lizzie Adama, whose role develops across the series.
The contrast between the experienced detective and the younger officer adds emotional complexity to the investigations.
A Strong British Cast Brings the Mystery to Life
Alongside Whelan and Sharif, the series features a substantial ensemble cast.
Emmett J. Scanlan plays Kieran Shaw, while Jimmy Akingbola portrays Steve Bradshaw.
Other performers include Karl Davies, Ella Smith, Bobby Lockwood, Michael Karim and Robin Morrissey.
The supporting characters are important because The Tower is not simply concerned with identifying suspects.
It also examines how professional loyalties, conflicting priorities and personal decisions influence an investigation.
As relationships develop, the audience gains a fuller understanding of the pressures affecting the officers involved.
That emphasis on character gives the series more depth than a conventional procedural built entirely around collecting clues.
Why This Crime Drama Is Worth Watching
One of The Tower‘s greatest strengths is the way it begins with an immediately compelling mystery.
The image of two people falling from a tower block, followed by the disappearance of a surviving police officer, creates questions that demand answers.
Rather than resolving those questions quickly, the drama gradually reveals information that changes how viewers interpret the incident.
Its storytelling combines the suspense of a missing-person investigation with the complexities of police accountability.
The result is a crime series that focuses on the consequences of the investigation as much as the crime itself.
Fans of Line of Duty, Broadchurch and other character-driven British detective dramas may particularly appreciate its atmosphere and layered storytelling.
The show also benefits from relatively compact seasons, allowing each mystery to develop without requiring a lengthy commitment.
Where Can You Watch The Tower?
All three seasons of The Tower are available to stream on ITVX in the United Kingdom, according to the October 2026 viewing guide.
The first season premiered in 2021, followed by the second in 2023 and the third in 2024.
For newcomers, beginning with the original tower-block investigation is the best way to understand Sarah Collins, Lizzie Adama and the relationships that continue through later seasons.
While each instalment introduces its own central case, the characters’ personal and professional histories remain connected.
The Final Verdict
The Tower is a strong choice for viewers looking for a tense British police thriller with disturbing mysteries and morally complicated characters.
Its opening premise is particularly effective: two people fall to their deaths, two others survive, and one of those survivors suddenly disappears.
From that point, the story develops into an investigation where the truth becomes harder to establish as more details emerge.
Gemma Whelan gives the series a convincing central character, while Tahirah Sharif and the supporting cast add further depth to the unfolding drama.
The most compelling question is not simply how two people died on a London rooftop. It is what happened in the moments before their deaths — and why a police officer who survived the incident vanished before investigators could obtain the answers they needed.
With three seasons offering different mysteries, The Tower provides an absorbing viewing experience for crime-drama fans who enjoy suspense, police investigations and secrets that slowly come to light.