The best episodes of Line of Duty
Ranked by viewer rating, highs first. Lit marks on the season rail place this list across the run. Vote on a placement to back it or contest it.
- 01
On the strength of evidence from a new witness, DCI Jo Davidson brings Terry Boyle back in for questioning about Gail Vella's murder. Kate is torn between loyalty to Jo and wanting to assist AC-12's investigation, and tensions increase when Kate encounters a face from the past with links to organised crime.
- 02
DCI Jo Davidson faces increasing pressure from all sides as AC-12 make major breakthroughs in the investigation.Hastings acknowledges that the disciplinary action against him put Kate and Steve in a difficult position, and a forensic report from Farida's house results in a shock for AC-12.
- 03
As AC-12 struggle to deal with the repercussions of tragic events, Hastings makes one final bid to uncover institutionalised corruption before his time runs out.
- 04
Tensions rise in the OCG following the events at Eastfield. With troubling questions hanging over the identity of 'H', suspicions mount at AC-12.
- 05
AC-12 link Gail Vella's murder with a historic case of police corruption, and Kate hatches a plan to tell once and for all if Jo is bent.They are closer than ever to cracking the case, but when Hastings' authority is undermined it leaves his team in a potentially dangerous situation.
- 06
With Gates on the run, the anti-corruption team come under pressure to close the case once and for all. Arnott is forced to make some tough decisions about where his loyalties lie. Fleming and Hastings go all out to catch Gates, leading to a shattering conclusion.
- 07
As shocking new evidence is unearthed, AC-12 step up their investigation in to the case against Michael Farmer. Could the real killer still be at large? Meanwhile, Detective Constable Jamie Desford joins the AC-12 team.
- 08
Roz's husband Nick is brought in for questioning by AC-12. But while Nick denies any involvement in Steve's attack, his suspicions about Roz mount. Meanwhile, AC-12 discover new anomalies in the forensic evidence and issue DCI Roz Huntley with a second Reg 15 notice. AC-12's case appears watertight until Roz starts dismantling their evidence with inside information of her own.
- 09
When new information comes to light about a possible suspect in a year-long unsolved murder investigation, DCI Joanne Davidson appears keen to finally bring Gail Vella's killer to justice. However, after her conduct arouses suspicions, it's not long before AC-12 are on the case. But as AC-12's investigation uncovers deeper and darker information, will DCI Joanne Davidson turn out to be their most dangerous adversary yet?
- 10
Having opened an official inquiry into DCI Jo Davidson and Operation Lighthouse, AC-12 begin to suspect a cover up. Steve and Chloe dig into Gail Vella's controversial reporting for clues to her murder, and find links to previous AC-12 cases. Their investigation takes a shocking turn when they begin to scrutinise Jo's personal life.
- 11
DS Steve Arnott is arrested on suspicion of murder but continues to protest his innocence. Does DC Kate Fleming's undercover operation hold the key to Steve's guilt and the identity of the Caddy? AC-12 legal counsel Gill Biggeloe pressurises Superintendent Ted Hastings but some new evidence leaves the enquiry turning on its head.
- 12
After months of hunting a serial killer, DCI Roz Huntley faces intense pressure to apprehend a suspect. Michael Farmer is caught and charged with the crimes, but doubts about the young man's guilt lead the chief forensic investigator to AC-12.When DCI Roz Huntley captures a serial killer, Forensic Coordinator Tim Ifield alerts AC-12 to a possible miscarriage of justice.
- 13
AC-12's future hangs in the balance, after Hilton bars them from investigating Roz Huntley. But Roz's problems are building closer to home.
- 14
The explosive series finale pits AC-12 against Roz in a climactic duel to find Tim's murderer and unmask Balaclava Man.
- 15
Following the deadly hijack of a police convoy, AC-12 target a ruthless organised crime group known to have links with corrupt officers.
- 16
Corbett's most daring plan yet requires McQueen to exploit links with corrupt police officers. AC-12 make a shocking discovery.
- 17
With time running out, AC-12 attempt to unmask 'H', the Fourth Man (or Woman) commanding the network of corrupt officers behind the murder of Gail Vella. But sinister and powerful forces appear intent on orchestrating a cover-up.
- 18
Desperate for proof of Gates's corruption, Fleming pushes her relationship with him to the limit. But her behaviour causes Morton to question if she might not be such a loyal colleague after all.
- 19
A dismembered body is discovered, and worries grow when Roz fails to report for duty. After further questioning of Michael Farmer unearths crucial new information, AC-12 challenge the case against him. Meanwhile Arnott and Fleming continue to clash.
- 20
In a nail-biting finale, closely guarded secrets are revealed.Carmichael's dogged interrogation of Hastings presents mounting evidence of suspicious behavior. Caught in the crossfire, Kate and Steve are torn between loyalty to Hastings and their duty to uncover the truth, however painful. Will the identity of "H" be revealed at last?
- 21
Arnott is convinced Gates played a part in Jackie's disappearance. With Fleming's help, the anti-corruption team tries to trap Gates into revealing his involvement in covering up Jackie's crimes.
- 22
Fresh testimony launches AC-12 back on the trail of the Caddy, a corrupt officer with links to organized crime. But new disturbing evidence suggests the Caddy may reside within AC-12.
- 23
A fresh police leak enables another audacious raid, Arnott's attempts to gather information put him in a dangerous situation, and the team tries to contact the undercover officer.
- 24
Having been duped into covering up Jackie's crime, Gates is desperate to sever ties with her. But, as Arnott and Fleming close in on his secret, Gates is plunged into an even more dangerous situation than he first thought.
- 25
Following the violent attack she suffered in prison, Lindsay is granted special dispensation to visit her dying mother. Meanwhile, deputy chief constable Dryden shrugs off allegations about his relationship with Lindsay and possible links to the ambush.
Shows like Line of Duty
The closest matches on shared genres, ranked by match strength and popularity.
- 01Drama·Crime·ThrillerThe best episodes of True Detective2014–present
Touch darkness and darkness touches you back. - 02Drama·Crime·ThrillerThe best episodes of The Blacklist2013–2023·NBC
The Blacklist is a crime drama involving a former government agent who turned into a high-profile criminal turning himself in to the FBI offering to help catch criminals. - 03Drama·Crime·ThrillerThe best episodes of Criminal Minds2005–present·Paramount+
Criminal Minds revolves around an elite team of FBI profilers who analyze the country's most twisted criminal minds, anticipating their next moves before they strike again. - 04Drama·Crime·ThrillerThe best episodes of Breaking Bad2008–2019·AMCBreaking Bad follows protagonist Walter White, a chemistry teacher who lives in New Mexico with his wife and teenage son who has cerebral palsy.
- 05Drama·Crime·ThrillerThe best episodes of Euphoria2019–2026Euphoria follows a group of high school students as they navigate love and friendships in a world of drugs, sex, trauma, and social media.
- 06Drama·Crime·ThrillerThe best episodes of The Killing2011–2014·AMC
The Killing follows Seattle homicide detectives Stephen Holder and Sarah Linden and their work as detectives investigating murders.
