TV series
London police detectives Cassie Stuart and Sunny Khan investigate historic cold cases involving missing persons, murder and long-hidden secrets.
Streaming, rental and purchase options
Checked Jul 22, 2026
Unforgotten is available to stream on Prime Video in United States. You can also rent or buy it from Google Play, Amazon, Apple TV, and Fandango at Home. Use the direct links below to open the provider.
London police detectives Cassie Stuart and Sunny Khan investigate historic cold cases involving missing persons, murder and long-hidden secrets.
Choose an episode, then use the watch options above for the show.
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.
Directed by Andy WilsonWritten by Chris LangGuest stars Georgia Mackenzie, Lucinda Dryzek, Andrew Neil, Aasiya Shah, Anoushka Chadha, India Ria Amarteifio, Alex Jennings, Neil Morrissey
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.
Directed by Andy WilsonWritten by Chris LangGuest stars Andrew Neil, Alex Clatworthy
Episode 3
Cassie and Sunny begin their interviews...
Directed by Andy WilsonWritten by Chris LangGuest stars Sasha Behar, Aasiya Shah, Anoushka Chadha
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.
Directed by Andy WilsonWritten by Chris LangGuest stars Lucinda Dryzek
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.
Directed by Andy WilsonWritten by Chris LangGuest stars Lucinda Dryzek
Episode 6
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.
Directed by Andy WilsonWritten by Chris LangGuest stars Lucinda Dryzek, Aasiya Shah, Anoushka Chadha
Episode information updated Jul 24, 2026
Nicola WalkerDCI Cassie Stuart
Sanjeev BhaskarDS Sunil 'Sunny' Khan
Sinéad KeenanDCI Jessica 'Jessie' James
Jordan LongDS Murray Boulting
Lewis ReevesDC Jake Collier
Pippa NixonDC Karen Willetts
Georgia MackenzieDr. Leanne Balcombe
ITV1United Kingdom
