Marcella

Former detective Marcella Backland is devastated when her husband abruptly leaves her, claiming he no longer loves her. Returning to her old job with the Metropolitan Police's murder squad after a decade away, she pursues a hunch related to an ongoing case involving a serial killer.

The Gibson family is thrown into chaos after Grace goes missing, prompting Marcella to investigate the night's events through CCTV footage. Meanwhile, Cara returns home with stolen jewelry from her latest heist, unaware that the items are linked to the notorious Grove Park Killer, putting her in grave danger.

Marcella attempts to remain composed after Grace's body is found and tries to conceal that she was among the last to see her. Sylvie grieves the loss of her daughter and is further upset to discover Grace's affair with Jason, while Henry seeks solace in his friends Matthew and Yann. Meanwhile, Peter, recently released from open prison, goes to Maddy, who lies to him about having a boyfriend.

A failed assault on an elderly man provides police with fresh clues in the Grove Park murders, while Marcella investigates a taxi driver who may have witnessed her outside the victim's home.

Mo blames the police for Hassan's shooting, Marcella succeeds in obtaining crucial information about Grace's death from Peter Cullen, Jason regains his position at DTG under questionable circumstances, and deliveryman Ronnie makes a fateful error in judgment.

Marcella is deeply affected when the killer targets a six-year-old girl, and a DNA match provides the police with their most promising lead. Meanwhile, DI Tim Williamson re-examines Andrew Barnes' death to determine if it was truly a suicide.

Mo confronts Marcella after discovering his brother's body, while the detective questions the official narrative as police focus on Yann. Meanwhile, Tim investigates the suspicious death of Andrew Barnes, leading him to connect with Jason.

Marcella searches for Matthew by interrogating Henry at his residence, while Jason faces increasing tension as Tim's inquiry into Andrew Barnes' murder progresses, ultimately uncovering the killer's identity and sending shockwaves through the team.

A young boy's body is found, prompting Marcella and her team to investigate a case that leads them to a serial killer preying on children.

Marcella is encouraged to confront the trauma of Juliet's cot death as a possible trigger for her blackouts, but revisiting the scene leads to another fugue state. Meanwhile, the team investigates a hit-and-run accident where a cyclist is killed and a body wrapped in familiar stuffed toys is found in the car's boot.

Marcella intensifies her efforts to bring down Phil Dawkins, but her relentless pursuit leads to unexpected and tragic outcomes that force her to reevaluate her actions. At the same time, her recurring blackouts raise concerns about her ability to retain custody of her children.

Adam escapes from the killer's prison but passes out in the car of an elderly couple during his getaway. At the same time, Marcella questions Reg about a stolen binder from his home, and Phil begins to target the detective.

Kevin Hoffs and his blue lorry are discovered abandoned in a lay-by, having been there for 36 hours. Marcella and her team discover through Adam's phone records that he contacted the KidsCall helpline, where he disclosed being abused by his father, though his father has alibis for several key events.

Vince Whitman's arrest strains the relationship between Tim and Marcella. At the same time, a viral video from Postfeed24 prompts the team to uncover a new body near them.

Marcella visits Nigel Stafford's home to ask him questions about the case. She discovers a small grave near the house before entering through an unlocked door, where she is unexpectedly confronted by Nigel, who is holding a knife.

Marcella urgently pursues the killer who has taken Edward, following clues that lead her to an empty house with only a ringing phone. A premonition provides potential hints, but time is critical as she races to reach her child.

Marcella, now living undercover in Belfast, works as an operative infiltrating a powerful family involved in illicit activities.

Marcella draws public attention after being recognized, and later discovers a mysterious note on her car. Meanwhile, Bobby faces complications when DCI Sangha arrives in Belfast, forcing him to take steps to conceal his activities.

Marcella investigates after receiving a mysterious package, while DCI Sangha notices a suspiciously familiar individual at Jessie's memorial. Meanwhile, Finn uncovers the identity of the person who supplied Jessie with heroin.

The Maguires attempt to have Bobby smuggled out of the United Kingdom, but complications arise during his transport to the airport. Meanwhile, Katherine contacts Marcella with a menacing message.

Marcella becomes wary of Frank following a new threat from her stalker. She identifies one of Bobby's abductors through police records and pursues him.

Marcella reflects on Frank's rescue and reprogramming of her 18 months prior. When Stacey escapes from the Maguires with her infant, Marcella is tasked with locating her.

Finn exploits Rory's fear to coerce him into forming an alliance. Marcella challenges Frank with a revelation about his history. DCI Sangha becomes aware of Stacey's arrest.

Marcella experiences another blackout and later discovers a dead body, raising new questions. Jack, curious about DCI Sangha's continued presence in Belfast, begins his own investigation.