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Unforgotten

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S6 E6

About Unforgotten

Unforgotten is a mystery and drama TV series that premiered on ITV1 on October 8, 2015. It has 6 seasons and 36 episodes so far and is still airing new episodes. The latest episode, Season 6 Episode 6, aired on February 24, 2025.

London police detectives Cassie Stuart and Sunny Khan investigate historic cold cases involving missing persons, murder and long-hidden secrets.

  • Mystery
  • Drama
  • Crime

Last updated

Episodes

36 episodes · 6 seasons

Unforgotten Season 7 hasn’t been dated yet. See what we know. Release date →

Season 1

2015 · 6 episodes · Last episode: 10 years ago

When the bones of a young man are found beneath the footings of a demolished house, an investigation begins that will unravel the lives of four people who have been waiting for this moment for nearly forty years, as they discover that the past can’t, and won’t, stay buried forever.

Unforgotten Season 1 release dates →
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    6. Episode 6

    Finale

    As the investigation into Jimmy's death concludes, Father Robert finds that revealing the truth has lasting repercussions and Maureen lays her son Jimmy to rest.

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    5. Episode 5

    As the investigation into Jimmy's death continues, Sir Phillip Cross makes a difficult decision while Father Robert comes clean to his family and the police.

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    4. Episode 4

    The investigation into Jimmy's death continues, as Cassie and Sunny question Sir Phillip Cross.

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    3. Episode 3

    As the investigation in to Jimmy's death continues, Cassie and Sunny visit Father Robert Greaves hoping to identify the mysterious Jo-Jo.

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    2. Episode 2

    DCI Cassie Stuart begins to identify the people mentioned in the diary of Jimmy Sullivan.

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    1. Episode 1

    When a skeleton is unearthed, a car key found near the body is the only clue to the identity of the victim.

Season 2

2017 · 6 episodes · Last episode: 9 years ago

When the remnants of a body are found hidden in a river, DCI Cassie Stuart and DS Sunny Khan are faced with an impossible investigation. David Walker disappeared in 1990 at the age of 34. Only scraps of potential leads remain, but relentless work leads Cassie and Sunny to four people. Each has a connection to Walker, and a painful secret that might have driven them to murder. They are the pieces of the jigsaw Cassie and Sunny must solve. But the harder they try to put this picture together, the more blurred it becomes. It’s a case that will test their relationship in unexpected ways.

Unforgotten Season 2 release dates →
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    6. Episode 6

    Finale

    Having come to another dead end, Cassie and Sunny work on trying to prove a final theory into David Walker's death and catch the culprit.

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    5. Episode 5

    Cassie begins to investigate the Brentford house and the theory that one or more of the suspects may have been abused at the gatherings that took place there. The enquiry reveals some information that allows Colin to come to terms with a shame that he has lived with for over 25 years. Sara is forced to confront her past in order to prove her innocence. Marion pushes her family even further away.

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    4. Episode 4

    A disturbing allegation about David opens up a second line of enquiry for the team. How much Tessa actually knew about David's life threatens to ruin her relationship with her husband and son. Marion gets into trouble at work and jeopardises her marriage by refusing to open up about her past. After having his phone stolen and information exposed, Colin is blackmailed again - and Sarah's secrets push her family to breaking point.

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    3. Episode 3

    Further examination of David Walker's history suggests that he was a troubled man with a number of issues. Marion has a prickly chat with Cassie about her past and the investigation reveals her close relationship with an IRA activist. As the police enquiries encroach on their lives, Sara and Colin open up to their partners.

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    2. Episode 2

    Crime drama series. Detectives Cassie and Sunny begin to find out a bit more about who David Walker was through speaking to his ex-wife Tessa.

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    1. Episode 1

    Detectives Cassie and Sunny reunite as they take on a case concerning the remains of a body found locked in a suitcase in the River Lea. As the pair begin the complicated task of trying to identify the body, the stories of four people with apparent links to the victim begin to unfold. Old wounds are reopened when the detectives track down the victim's wife and son, who have been in the dark about his disappearance for 26 years. Who wanted the man dead and why?

Season 3

2018 · 6 episodes · Last episode: 8 years ago

When workmen carrying out carriageway repairs on M1 uncover human remains in the central reservation, Cassie and the team investigate.

Unforgotten Season 3 release dates →
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    6. Episode 6

    Finale

    Following the discovery of seemingly incriminating items found at his house, Tim insists he bought them for his girls at a fete in Middenham. However, the team are not buying Tim's story. A new discovery leaves the team shocked and devastated, hitting Cassie particularly hard.

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    5. Episode 5

    James, Tim and Chris are exposed as having lied about their whereabouts on the night Hayley died. Pete reveals that he saw Eliot climbing into the holiday home through a window on New Year's Day, while leaves James struggling with the possibility that his son may have killed Hayley. Fran cracks a code in the dead girl's diary, suggesting that she met a local drug dealer on the night she disappeared.

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    4. Episode 4

    It becomes clear to the detectives that the four men have conspired to come up with a false account of what took place the night Hayley disappeared. Jake is assigned to track down Tim Finch's ex-wife to hear her version of events - and uncovers disturbing information about Chris Lowe's past. On a personal front, Sunny is offered the opportunity to rekindle his past marriage, and Cassie worries about her father's failing memory.

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    3. Episode 3

    Cassie and Sunny begin their interviews...

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    2. Episode 2

    Cassie and Sunny go in search of Hayley's family as the press begin to take an interest in the story. A detective who was involved in the original investigation offers his thoughts on why her disappearance remained unsolved, pointing out that Hayley's boyfriend was suspected of the crime but was never charged. The distance between where Hayley was last seen and where her body was found leads Cassie to form a new theory - that the killer may have travelled up from London, then returned before they could be questioned.

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    1. Episode 1

    When the body of a teenage girl who went missing at the turn of the millennium is found at a building site off the M1 motorway, four men are placed under the spotlight and their relationships are tested to the limit.

Season 4

2021 · 6 episodes · Last episode: 5 years ago

The fourth season opens with the discovery of a dismembered body in a scrap metal yard, which the team believe has been stored in a domestic freezer for thirty years. A unique Millwall Football Club tattoo leads to the victim being identified as Matthew Walsh, a young man in his mid-twenties who went missing in March 1990.

Unforgotten Season 4 release dates →
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    6. Episode 6

    Finale

    Despite a tragic turn of events, Sunny and the team narrow down the suspects.

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    5. Episode 5

    Cassie and Sunny interview two of the suspects again and get closer to the truth of what happened to Walsh. Balcombe believes she may have found the cause of death.

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    4. Episode 4

    Cassie and Sunny discover Walsh was chased by all four suspects on the night in question. Willets realizes Fiona's blood sample may have been deliberately lost by Liz.

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    3. Episode 3

    Cassie and Sunny interview each of the four suspects, who all deny knowing the victim. Bouting discovers Walsh was cautioned three weeks before his death.

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    2. Episode 2

    Cassie and Sunny identify four potential suspects who trained as police probationers together, and two of them are still serving officers. They have no luck finding the rest of the body and decide to go public about the discovery of Walsh's remains.

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    1. Episode 1

    A dismembered body is found in a scrapyard and the team believes the remains had been stored in a domestic freezer for 30 years. Meanwhile, after making the decision to retire from the police force, Cassie faces a dilemma when she learns she isn't entitled to her full pension payment unless she completes her 30 years of service.

Season 5

2023 · 6 episodes · Last episode: 3 years ago

Jessica James succeeds Cassie Stuart as DCI, after two interim leaders. The detectives are on a mission to uncover the mystery behind an unsolved murder that occurred 39 years ago. Beneath the ground of a demolished house, the bones of the victim are found. With this evidence, the modern police team open a case to unearth the history that has remained buried for decades. Four main suspects emerge, and as their dark past is unraveled, the truth behind the events of the crime are finally revealed.

Unforgotten Season 5 release dates →
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    6. Episode 6

    Finale

    Can Sunny, Jess and the team bring the clues in the case together and unravel the secrets to solve it?

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    5. Episode 5

    Despite the trouble in their personal lives, Sunny and Jess attempt a reset as they follow the clues in the case.

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    4. Episode 4

    Sunny and Jess’s personal lives go from bad to worse while they struggle to keep focused. Meanwhile, the suspect list grows and a mother and son are put under the microscope.

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    3. Episode 3

    The victim’s turbulent past comes to light. While Sunny takes a trip to Paris and Jess drops in on an unsuspecting Lord, the pair continue to butt heads.

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    2. Episode 2

    The team work to identify the body found in the chimney flue as forensics reveal the cause of death. Jess and Sunny visit the victim’s mother to break the devastating news. They find the pair had a tumultuous relationship.

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    1. Episode 1

    When a severed leg is discovered in a bricked-up chimney flue the team get to work identifying the victim and cause of death. Cassie’s replacement on the force, DCI Jess James, has a rocky start as she clashes with a grieving Sunny.

Season 6

2025 · 6 episodes · Last episode: 1 year ago

When suspected human remains are uncovered on Whitney Marsh, Jess and Sunny are immediately called to the scene. Dr Balcombe’s analysis reveals that the remains are relatively recent and suggest a grim conclusion: the body was placed there already dismembered. With this insight, Jess and Sunny intensify their search certain that other body parts may not be far away.

Unforgotten Season 6 release dates →
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    6. Episode 6

    Finale

    For better or worse, Jess and Sunny finally get the truth from Asif, Marty, Mel, and Juliet. But both on and off the case, the truth leads to difficult decisions.

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    5. Episode 5

    Lies are uncovered, and suspects are taken into custody, but who's protecting who? Meanwhile, Jess plans a conversation with Steve.

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    4. Episode 4

    With the details of the deceased's life becoming clearer and one suspect already being questioned, the Bishop Street team find suspects further afield.

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    3. Episode 3

    The team discover Asif, Mel, and Marty’s connections to the deceased, and bring Marty in. Secrets from the deceased's past come to light, and Jess reaches out to her sister.

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    2. Episode 2

    The Bishop Street team investigate the deceased's record, relationships, and enemies, and Jess and Sunny make contact with his widow. No one is as innocent as they first seem.

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    1. Episode 1

    When a spine is dredged out of Whitney Marsh, a new case begins for Jess and Sunny’s team at Bishop Street CID. Four potential suspects soon appear, each with secrets to hide.

Cast & crew

Created by Chris Lang

  • Pippa Nixon

    Pippa Nixon

    DC Karen Willetts

  • Georgia Mackenzie

    Georgia Mackenzie

    Dr. Leanne Balcombe

  • Sasha Behar

    Sasha Behar

    Jamila Faruk

  • Lucinda Dryzek

    Lucinda Dryzek

    Claire Finch

  • Andrew Lancel

    Andrew Lancel

    Steve James

  • Kate Robbins

    Kate Robbins

    Kate

  • Andrew Neil

    Andrew Neil

    Mr. Salthouse

  • Alex Clatworthy

  • Tamzin Malleson

    Tamzin Malleson

    Caroline Greaves

  • Aasiya Shah

    Aasiya Shah

    Gemma Khan

  • Anoushka Chadha

    Aisha Khan

  • Daniel Boys

    Daniel Boys

    Paul Bradley

  • Zephryn Taitte

    Zephryn Taitte

    Scott

  • River Archer

    River Archer

    Eliot James

  • Hubert Hanowicz

    Hubert Hanowicz

    Szymon Nowak

  • Anna Benton

    Sophie Coulson

Unforgotten FAQ

When is the next episode of Unforgotten?

A date for the next episode of Unforgotten hasn't been announced yet. Follow Unforgotten in the Streambay app and you'll be notified as soon as a new episode airs.

When did the latest episode of Unforgotten come out?

The most recent episode of Unforgotten, Season 6 Episode 6, aired on February 24, 2025.

How many seasons of Unforgotten are there?

Unforgotten has 6 seasons with 36 episodes in total.

When did Unforgotten first air?

Unforgotten first aired on ITV1 on October 8, 2015.

How do I get notified when new episodes of Unforgotten are released?

Download the Streambay app, follow Unforgotten, and you'll get a push notification the moment each new episode is released.

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