After two decades, the US aims to end its longest-ever war, but its withdrawal threatens to plunge Afghanistan back into repressive, bloody violence.

Interviews and chilling archival recordings chronicle the chaos that unfolded during the 9/11 attacks, whose origins can be traced to the 1980s.

Survivors recount the horrors they endured on 9/11. Immediately after the attacks, George W. Bush begins charting America’s aggressive military response.

Learning the hijackers benefitted from gaps in US intelligence, the White House justifies a secret surveillance program and “enhanced interrogation.”

In a small rust belt town in southwest Pennsylvania, Chief of Police Del Harris investigates after a dead body turns up in an abandoned steel mill. Series premiere.

Harris’ investigation continues. Isaac leaves town. Billy and Lee reunite as Buell celebrates a shotgun wedding.

Grace enlists help in her effort to unionize the dressmakers. The sheriff gets an anonymous tip about the murder in the steel mill.

Isaac befriends someone who teaches him the rules of the road. The sheriff searches for evidence in Billy and Grace’s trailer. Billy tells Lee what happened in the steel mill.

Harris races the clock in his search for the anonymous eyewitness. Lee seeks professional advice about whom to protect. Harris’ old Pittsburgh PD partner pays him a visit.

Alejandro learns of Lee’s history with Billy. Isaac turns his first trick solo. Harris travels back to Pittsburgh with his old partner to repay a debt.

Billy gets in with a questionable crowd. Isaac travels alone. Harris’ investigation into the anonymous eyewitness continues as a high school football player ODs.

Isaac is taken in by a kind stranger. Grace’s union drive is put to the test. Billy fires his public defender. Harris realizes what he has to do.

Harris finally finds the anonymous eyewitness. Lee decides not to return to New York. Billy is returned to the general prison population to face the consequences of his actions. The…

While the town prepares for Lara’s vigil, Miri is unwittingly taken to meet Billy’s family for the first time, and attempts to reinvent herself.

A series of disasters threaten to derail Miri’s first date with Billy. Meanwhile, Caroline and Oscar find a visitor on their doorstep and must finally reckon with Caroline’s affair.

With the former police chief still missing, Miri takes her driving test. Oscar enlists Dom to help with his environmental activism.

Knowing she must go to the police, Miri’s final day with Billy is interrupted by his domineering mother.

Between modern day sex and bank accounts, Miri is once again baffled by the world today as she navigates both her new job and her budding relationship with Billy.

Believing the murderer might be a famous resident whom is difficult to access, the group seeks advice from a renowned podcasting host.

Mabel slips away on a solo mission tracking the victim’s final days. Suspicious, Charles & Oliver follow her.

Mabel brings her new friends (and an old one) to her childhood home to meet her mother. Meanwhile, Detective Williams starts to have her own doubts about the case as…

With the investigation scratching at a web of old crimes originating inside the building, a mysterious young man turns the tables to spy on Charles, Oliver & Mabel.

Hitting a dead end, the group calls for reinforcements in the form of their podcast’s Superfans.

With the residents growing upset at the building’s negative publicity, the trio faces a revolt. Charles is visited by an old colleague who sheds light on his past.

In the season finale, the trio races toward a resolution while their own lives are put in danger.

Miri is moving on with her life with a new job and a date with Billy. But her past returns to trouble her with the arrival of a surprise visitor.

Upper West Side neighbors Charles, Oliver & Mabel bond over a shared love of true crime. When a fellow resident dies in their building, the trio determine to solve the…

The group begins researching the victim. Meanwhile, Mabel’s secretive past starts to be unraveled.

Oliver employs his theater director skills to analyze the case. Charles & Mabel question an obsessive cat lover.

Thirteen years after their son’s racist murder, Stephen Lawrence’s parents continue their fight for justice. Meanwhile, DCI Clive Driscoll finds Stephen’s cold case files.

DCI Driscoll tries to win the trust of the Lawrence family and key witnesses. After a forensic breakthrough, the team needs to prove the integrity of the evidence before they…

Gary Dobson and David Norris stand trial for Stephen’s murder. The defence argue that potential cross contamination in the years since the murder makes forensic evidence unsafe.

Amy is trapped and running out of time, but will assistance arrive too late? On land, Kirsten chases down the traitor’s accomplice. When the traitor on Vigil puts their plans…

When a crew member is found dead aboard the Trident nuclear submarine HMS Vigil, Detective Amy Silva is flown out to investigate.

With Vigil in danger, Amy must fight to continue her investigation. Meanwhile, Kirsten’s enquiries lead to tragedy.

Kirsten’s investigation takes her into the heart of Scottish politics, but when she unearths a navy cover-up, it leaves Amy questioning who she can trust on Vigil.

Kirsten closes in on the killer, but their capture reveals the grave threat that Vigil faces. On the submarine, Amy makes a terrifying discovery.

Vigil is forced into lockdown as disaster strikes. With communication lost, Kirsten desperately hunts for clues to the source of the threat to Vigil.