Unforgotten

Unforgotten is a British crime drama television series, which initially aired on ITV on 8 October 2015. It was created and written by Chris Lang and directed by Andy Wilson. The programme follows a team of London detectives led by DCI Cassie Stuart (Nicola Walker) (Series 1–4), DCI Jessie James (Sinéad Keenan) (Series 5) and DI Sunny Khan (Sanjeev Bhaskar) as they solve cold cases of disappearance and murder.

Each series consists of six episodes. Series 1 to 4 were broadcast in the UK in 2015, 2017, 2018 and 2021. On 30 March 2021 a fifth series was announced, scheduled for release in 2023, and it was confirmed that Sanjeev Bhaskar would reprise his role. A year later it was confirmed that Sinéad Keenan would replace Walker as Bhaskar's new partner, DCI Jessica "Jessie" James. Filming for the fifth series began on 14 March 2022. The first episode of series 5 premiered on ITV in February 2023.

Each series deals with a new case, introducing seemingly unconnected characters who are gradually revealed to have some relationship with the victim. As the murder mystery unfolds, the emotional ramifications of the crime on the lives of those affected are also explored.

Unforgotten has received critical acclaim. Tom Courtenay won the 2016 BAFTA TV Award for Best Supporting Actor for the first series and Mark Bonnar won the 2017 BAFTA Scotland for Best Actor in Television for the second series.

Plots of each series
Series 1 focuses on the murder of James "Jimmy" Sullivan (Harley Alexander-Sule), a 17-year-old who disappeared in 1976. His remains are discovered during the demolition of a house in north London.

Series 2 follows the murder of David Walker (Daniel Gosling), a Conservative Party consultant who went missing in 1990. His saponified remains are found in a suitcase in the River Lea in north-east London.

Series 3 investigates the murder of schoolgirl Hayley Reid (Bronagh Waugh), who disappeared from a seaside resort town on New Year's Eve 1999. Her skeleton is discovered by workmen repairing the central reservation of the M1 motorway in London.

Series 4 follows the discovery in 2020 of Matthew Walsh's headless and handless corpse, found inside an old Freezer during a house clearance in north London, apparently frozen since his disappearance in 1990 when he encountered five police trainees celebrating their Passing Out from the academy.

Plots and themes spanning series
Series 1 to 4 include the story of DCI Cassie Stuart's personal life: of the typical but growing conflicts in her immediate family, of her spartan arms-length relationships with individuals who like her, of her drive to solve cases and of her coping both successfully and unsuccessfully with the relentless strain of her job. During the historical cold cases, Cassie verbalizes her driving motives: find the truth of what happened, provide closure to the living and possibly bring a criminal to justice. An inner motive surfaces when she says she hopes solving a current case will help "... [me] move on... If we can do this right, if we can ignore who they are and do it by the book, then all the questions [and faces] might all go away. And I might be able to sleep at night."

Cast

 * Nicola Walker as DCI Cassandra 'Cassie' Stuart (series 1–4)
 * Sanjeev Bhaskar as DI Sunil 'Sunny' Khan
 * Sinéad Keenan as DCI Jessica 'Jessie' James (series 5)
 * Jordan Long as DS Murray Boulting
 * Lewis Reeves as DC Jake Collier (series 1–4)
 * Pippa Nixon as DC Karen 'Kaz' Willetts (series 1, 4-present)
 * Peter Egan as Martin Hughes, DCI Stuart's father (series 1–4)
 * Jassa Ahluwalia as Adam Stuart, DCI Stuart's son (series 1–4)
 * Colin R. Campbell as DSI Clive Andrews, DCI Stuart's boss
 * Carolina Main as DC Fran Lingley (series 2–present)
 * Alastair MacKenzie as ex-DCI John Bentley and later Cassie's partner (series 3–4)
 * Georgia Mackenzie as Leanne Balcombe, pathologist (series 3–present)
 * Michelle Bonnard as Sally Fields, Sunny's partner (series 3–present)
 * Janet Dibley as Jenny, Martin's partner (series 3–4)
 * Andrew Lancel as Steve James, DCI James’ husband
 * Kate Robbins as Kate, DCI James’ mother

Series 1 (2015) cast
• Tom Courtenay as Eric Slater

• Trevor Eve as Sir Phillip Cross

• Bernard Hill as Father Robert Greaves

• Ruth Sheen as Lizzie Wilton

• Gemma Jones as Claire Slater

• Cherie Lunghi as Shirley Cross

• Hannah Gordon as Grace Greaves

• Brian Bovell as Ray Wilton

• Frances Tomelty as Maureen Sullivan

• Claire Goose as Ellie Greaves

• Zoe Telford as Bella Cross

• Tamzin Malleson as Caroline Greaves

• Dominic Power as Les Slater

• Tom Austen as Josh Cross

• Adam Astill as Matt Slater

• Jonathan Harden as Sean Rawlins

• Tessa Peake-Jones as Sheila

• Harley Alexander-Sule as Jimmy Sullivan

• Silas Carson as Marcus Archer

• David Troughton as the bishop, Geoff

• Matthew Cottle as Liam Gough

• John Salthouse as ex-DCI Kendrick

• Dannie Pye as Vincent Erskine

• Ade Oyefeso as Curtis Salgado

• Yasmine Akram as Kelly

• Dominic Coleman as John Burton

• Sharon Duncan Brewster as CPS Lawyer Harding

Series 2 (2017) cast
• Lorraine Ashbourne as DI Tessa Nixon

• Mark Bonnar as Colin Osborne

• Rosie Cavaliero as Marion Kelsey

• Badria Timimi as Sara Mahmoud

• Adeel Akhtar as Hassan Mahmoud

• Charlie Condou as Simon Osborne

• Douglas Hodge as Paul Nixon

• Nigel Lindsay as Tony Kelsey

• Holly Aird as Elise Dunphy

• Wendy Craig as Joy Dunphy

• Emma Cunniffe as Janet

• Bryony Hannah as Cath

• Will Brown as Jason Walker

• Daniel Gosling as David Walker

• Katherine Jakeways as Nicola

• Josef Altin as Tyler Da Silva

• Nathalie Armin as DSI Kuldip Gill

• Maggie O'Neill as Ellen Price

• Mairead McKinley as Sinead Quinn

• Bill Paterson as Harry Osborne

• Louiza Patikas as Amy East

Series 3 (2018) cast
• James Fleet as Chris Lowe

• Alex Jennings as Tim Finch

• Kevin McNally as James Hollis

• Neil Morrissey as Pete Carr

• Sasha Behar as Jamila Faruk

• Emma Fielding as Amy Hollis

• Indra Ové as Maria Carr

• Amanda Root as Carol Finch

• Sara Stewart as Mel Hollis

• Bronagh Waugh as Jessica Reid

• Brid Brennan as Suzanne Reid

• Finlay Robertson as Mark Harper

• Tom Rhys Harries as Eliot Hollis

• Siobhan Redmond as Derran Finch

• Tori Allen-Martin as Sandra Rayworth

• Lucinda Dryzek as Claire Finch

• Jo Herbert as Emma Finch

• Gabrielle Glaister as Alison Pinion

• Sara Powell as The Arbiter

• Ash Rizi as Dr. Walsh

• Liran Nathan as Raheem

• Gerald Kyd as Adrian Mullery

• Samira Ahmed as herself interviewing Amy Hollis (Episode 4)

Series 4 (2021) cast
• Susan Lynch as DCC Liz Baildon

• Andy Nyman as Dean Barton

• Phaldut Sharma as DCI Ram Sidhu

• Liz White as Fiona Grayson

• Sheila Hancock as Eileen Baildon

• Lucy Speed as Marnie Barton

• Clare Calbraith as Anna Sidhu

• Daniel Flynn as Geoff Tomlinson

• Alec Newman as Mark Tomlinson

• Ronny Jhutti as Bal Sidhu

• Indira Joshi as Riya Sidhu

• James Craze as Matthew and Jerome Walsh

• Denise Black as DCI June Marshall

• Kate Williams as Mary Quinn

• Charles Dale as Chief Constable Robin

• Amanda Douge as Janet

• Mina Andala as Eugenia Castillo

• David Schofield as Clive Walsh

• Ian Burfield as Ian Henderson

• Elizabeth Counsell as Suzie Montgomery

Series 5 (2023) cast
• Ian McElhinney as Lord Anthony Hume

• Hayley Mills as Lady Emma Hume

• Martina Laird as Ebele Falade

• Mark Frost as Dave Adams

• Max Rinehart as Karol Wojski

• Rhys Yates as Jay (Joseph) Royce

• Hebe Beardsall as Cheryl

• Andrew Lancel as Steve James

• Mark Oosterveen as Graham Saville

Production
The series was originally developed, by Lang, as a serial titled 27 Arlington Crescent. Filming for the first series began in March 2015 and lasted for twelve weeks. Locations included Liverpool, the London suburbs, Kingston upon Thames, the Essex coast, Westminster and the Fens.

After the unexpected success of the initial series, ITV commissioned a second series, with Lang returning as writer and Wilson as director. It was shot on location by the River Lea, in the Cotswolds, and along the promenade in Brighton.

A third series order was announced on 2 March 2017, following strong viewing figures. Scenes were set in Lymington, Hampshire (which substituted for the fictional Middenham and its estuary), Uxbridge, Middlesex, Amersham in Buckinghamshire, Clifton in Bristol, Ealing in West London, and King's Lynn and Hunstanton in Norfolk. An empty mansion at Bulstrode Park near Gerrards Cross, Buckinghamshire provided the setting for the police station and lab. Only seven weeks after filming wrapped, the third series began broadcasting in the UK on 15 July 2018.

A fourth series was scheduled to be made in autumn 2019; however, ITV only confirmed in January 2020 that filming had commenced, with the planned broadcasting timeframe having been delayed. In September 2020, it was announced that filming had recommenced and the series planned on being screened in 2021, with actors Walker, Bhaskar, Reeves and Egan all reprising their roles. The new series eventually began screening in February 2021.

Filming for the fifth series began on 14 March 2022, with the airing of the series beginning on 27 February 2023.

In April 2023, ITV had renewed the crime drama for a sixth series and it is scheduled to air in 2024.

Series 1 (2015)
Episodes 1 – 5's ratings are based on 28-day data from BARB for ITV and ITV+1 and 7-day data for ITV HD. Episode 6's ratings are based on 28-day data from BARB for ITV, ITV+1 and ITV HD.

International broadcast
Prior to the UK broadcast of the third series, the first series premiered on 8 April 2018 in the United States, as part of PBS Masterpiece Mystery. After two back-to-back episodes were aired each week, the second series was similarly broadcast as three weekly parts from 29 April 2018 to 13 May 2018. Series 3 premiered on 7 April 2019. Series 4 premiered on 11 July 2021. Series 5 Premiered on 9 September 2023.

Home media
The first three series have been released on Region 2 DVD individually. A box-set release of the first two series was made available shortly after the broadcast of the second series. A further box-set release of the first three series came out shortly after the broadcast of the third series. The fourth series has also been released on Region 2 DVD on its own. The first four series have been made available on Amazon Prime in some countries.

Remake
In 2017, it was reported that a remake was in development for ABC in the United States, with Josh Berman, Sony Pictures Television and BBC Worldwide Productions producing. Retitled Suspects, it was to feature a new cast and crew. Chris Lang would not be involved in the United States version, and Nicola Walker would not make an appearance.