10 Best Episodes of Unforgotten

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

Written by Sophie and last updated on feb 06, 2023.

PS: The following content contains spoilers!

PPS: I will admit that parts of this page was written with the help of AI - it makes my work so much easier to not start from a blank page!

Unforgotten - S3E2

#15 - Episode 2 (Season 3 - 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.

The episode was rated 7.73 from 497 votes.

Unforgotten - S1E4

#14 - Episode 4 (Season 1 - Episode 4)


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

The episode was rated 7.76 from 614 votes.

Unforgotten - S3E3

#13 - Episode 3 (Season 3 - Episode 3)

Cassie and Sunny begin their interviews...

The episode was rated 7.79 from 483 votes.

Unforgotten - S1E5

#12 - Episode 5 (Season 1 - 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.

The episode was rated 7.79 from 588 votes.

Unforgotten - S1E6

#11 - Episode 6 (Season 1 - Episode 6)

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.

The episode was rated 7.82 from 628 votes.

Unforgotten - S2E3

#10 - Episode 3 (Season 2 - 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.

The episode was rated 7.85 from 636 votes.

Unforgotten - S2E5

#9 - Episode 5 (Season 2 - 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.

The episode was rated 7.86 from 611 votes.

Unforgotten - S3E4

#8 - Episode 4 (Season 3 - 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.

The episode was rated 7.86 from 496 votes.

Unforgotten - S4E3

#7 - Episode 3 (Season 4 - 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.

The episode was rated 7.88 from 333 votes.

Unforgotten - S4E4

#6 - Episode 4 (Season 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.

The episode was rated 7.91 from 329 votes.

Unforgotten - S4E5

#5 - Episode 5 (Season 4 - 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.

The episode was rated 7.92 from 327 votes.

Unforgotten - S3E5

#4 - Episode 5 (Season 3 - 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.

The episode was rated 7.96 from 483 votes.

Unforgotten - S3E6

#3 - Episode 6 (Season 3 - 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.

The episode was rated 8.21 from 488 votes.

Unforgotten - S2E6

#2 - Episode 6 (Season 2 - Episode 6)



The episode was rated 8.24 from 642 votes.

Unforgotten - S4E6

#1 - Episode 6 (Season 4 - Episode 6)

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

The episode was rated 8.24 from 331 votes.

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