Unforgotten

Season 4

TV-MA

93%94%

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.

Where to Watch Season 4

6 Episodes

Episode 1
E1
Episode 1A 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.
Episode 2
E2
Episode 2Cassie 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.
Episode 3
E3
Episode 3Cassie and Sunny interview each of the four suspects, who all deny knowing the victim. Bouting discovers Walsh was cautioned three weeks before his death.
Episode 4
E4
Episode 4Cassie 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. The pathologist identifies Walsh was murdered.
Episode 5
E5
Episode 5Cassie 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.
Episode 6
E6
Episode 6Despite a shocking event, the Bishop Street team start to piece together which of the four was responsible for the murder of Matthew Walsh but it is pathologist Leanne Balcombe who provides the crucial piece of evidence.