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
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.
Directed by Andy WilsonWritten by Chris LangGuest stars Georgia Mackenzie
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.
Directed by Andy WilsonWritten by Chris Lang
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.
Directed by Andy WilsonWritten by Chris Lang
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.
Directed by Andy WilsonWritten by Chris LangGuest stars Georgia Mackenzie
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.
Directed by Andy WilsonWritten by Chris LangGuest stars Georgia Mackenzie
Episode 6
Despite a tragic turn of events, Sunny and the team narrow down the suspects.
Directed by Andy WilsonWritten by Chris LangGuest stars Georgia Mackenzie
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
