The BEST episodes of Unforgotten

Every episode of Unforgotten ever, ranked from best to worst by thousands of votes from fans of the show. The best episodes of Unforgotten!

Dedicated detectives work tirelessly to unravel long-held secrets.

Last Updated: 2/24/2026Network: ITV1Status: Continuing
Episode 6
star
8.19
792 votes

#1 - Episode 6

Season 2 - Episode 6 - Aired 2/9/2017

As each of the suspects have either a motive or a connection to David Walker, Cassie and Sunny work on trying to prove a more far-fetched theory that involves travelling across the country and delving further into the past of the suspects.

Directors: Andy Wilson
Writer: Chris Lang
Watch Now:Amazon
Episode 6
star
8.17
592 votes

#2 - Episode 6

Season 3 - Episode 6 - Aired 8/19/2018

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.

Directors: Andy Wilson
Writer: Chris Lang
Watch Now:Amazon
Episode 6
star
7.95
843 votes

#3 - Episode 6

Season 1 - Episode 6 - Aired 11/12/2015

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.

Directors: Andy Wilson
Writer: Chris Lang
Watch Now:Amazon
Episode 6
star
7.88
263 votes

#4 - Episode 6

Season 6 - Episode 6 - Aired 2/24/2025

For better or worse, Jess and Sunny finally get the truth from Asif, Marty, Mel, and Juliet. But both on and off the case, the truth leads to difficult decisions.

Watch Now:AmazonApple TV
Episode 5
star
7.87
804 votes

#5 - Episode 5

Season 1 - Episode 5 - Aired 11/5/2015

As the investigation into Jimmy's death continues, Sir Phillip Cross makes a difficult decision, and Father Robert comes clean to his family and the police.

Directors: Andy Wilson
Writer: Chris Lang
Watch Now:Amazon
Episode 4
star
7.83
827 votes

#6 - Episode 4

Season 1 - Episode 4 - Aired 10/29/2015

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

Directors: Andy Wilson
Writer: Chris Lang
Watch Now:AmazonApple TV
Episode 5
star
7.82
765 votes

#7 - Episode 5

Season 2 - Episode 5 - Aired 2/2/2017

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.

Directors: Andy Wilson
Writer: Chris Lang
Watch Now:Amazon
Episode 3
star
7.80
790 votes

#8 - Episode 3

Season 2 - Episode 3 - Aired 1/19/2017

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.

Directors: Andy Wilson
Writer: Chris Lang
Watch Now:Amazon
Episode 3
star
7.77
449 votes

#9 - Episode 3

Season 4 - Episode 3 - Aired 3/9/2021

Cassie and Sunny interview each of the four suspects, who all deny knowing the victim. Boulting discovers Walsh was cautioned three weeks before his death and believes it was with Ram, while Collier manages to locate the rest of Walsh's body.

Watch Now:AmazonApple TV
Episode 3
star
7.75
601 votes

#10 - Episode 3

Season 3 - Episode 3 - Aired 7/29/2018

Cassie and Sunny begin their interviews...

Directors: Andy Wilson
Writer: Chris Lang
Watch Now:AmazonApple TV
Episode 3
star
7.72
864 votes

#11 - Episode 3

Season 1 - Episode 3 - Aired 10/22/2015

As the investigation into Jimmy's death continues, Cassie and Sunny visit Father Robert Greaves in a bid to identify the mysterious Jo-Jo.

Directors: Andy Wilson
Writer: Chris Lang
Watch Now:Amazon
Episode 4
star
7.70
347 votes

#12 - Episode 4

Season 5 - Episode 4 - Aired 3/20/2023

Sunny and Jess’s personal lives go from bad to worse while they struggle to keep focused. Meanwhile, the suspect list grows and a mother and son are put under the microscope.

Watch Now:Amazon
Episode 4
star
7.70
760 votes

#13 - Episode 4

Season 2 - Episode 4 - Aired 1/26/2017

A disturbing allegation about David opens up a second line of enquiry for the team. How much Tessa actually knew about David's life threatens to ruin her relationship with her husband and son. Marion gets into trouble at work and jeopardises her marriage by refusing to open up about her past. After having his phone stolen and information exposed, Colin is blackmailed again - and Sarah's secrets push her family to breaking point.

Directors: Andy Wilson
Writer: Chris Lang
Watch Now:AmazonApple TV
Episode 6
star
7.66
335 votes

#14 - Episode 6

Season 5 - Episode 6 - Aired 4/3/2023

Can Sunny, Jess and the team bring the clues in the case together and unravel the secrets to solve it?

Watch Now:Amazon
Episode 2
star
7.66
821 votes

#15 - Episode 2

Season 2 - Episode 2 - Aired 1/12/2017

Detectives Cassie and Sunny begin to find out a bit more about who David Walker was through speaking to his ex-wife Tessa. A search through the original investigation files and numbers traced from his pager help them build a picture of David, and lead them towards potential suspects. A conversation with David's old school friend leads Cassie and Sunny to believe that they may have found a motive.

Directors: Andy Wilson
Writer: Chris Lang
Watch Now:Amazon
Episode 2
star
7.65
444 votes

#16 - Episode 2

Season 4 - Episode 2 - Aired 3/1/2021

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.

Watch Now:Amazon
Episode 1
star
7.64
849 votes

#17 - Episode 1

Season 2 - Episode 1 - Aired 1/5/2017

A waterlogged suitcase holds the remains of David Walker, 25 years after he disappeared. Walker’s wife, Tessa, turns out to be a police officer. Cassie and Sunny interview two other suspects, Sara and Colin.

Directors: Andy Wilson
Writer: Chris Lang
Watch Now:Amazon
Episode 2
star
7.61
905 votes

#18 - Episode 2

Season 1 - Episode 2 - Aired 10/15/2015

DCI Cassie Stuart begins to identify the people mentioned in the diary of Jimmy Sullivan.

Directors: Andy Wilson
Writer: Chris Lang
Watch Now:Amazon
Episode 1
star
7.60
359 votes

#19 - Episode 1

Season 5 - Episode 1 - Aired 2/27/2023

When a severed leg is discovered in a bricked-up chimney flue the team get to work identifying the victim and cause of death. Cassie’s replacement on the force, DCI Jess James, has a rocky start as she clashes with a grieving Sunny.

Directors: Andy Wilson
Writer: Chris Lang
Watch Now:Amazon
Episode 1
star
7.60
469 votes

#20 - Episode 1

Season 4 - Episode 1 - Aired 2/22/2021

A dismembered body is found in a scrapyard and the team believes the remains had been stored in a domestic freezer for 30 years. 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.

Watch Now:Amazon
Episode 2
star
7.58
352 votes

#21 - Episode 2

Season 5 - Episode 2 - Aired 3/6/2023

The team work to identify the body found in the chimney flue as forensics reveal the cause of death. Jess and Sunny visit the victim’s mother to break the devastating news. They find the pair had a tumultuous relationship.

Writer: Chris Lang
Watch Now:Amazon
Episode 1
star
7.53
1029 votes

#22 - Episode 1

Season 1 - Episode 1 - Aired 10/8/2015

When a skeleton is unearthed, a car key found near the body is the only clue to the identity of the victim.

Directors: Andy Wilson
Writer: Chris Lang
Watch Now:AmazonApple TV
Episode 3
star
7.50
258 votes

#23 - Episode 3

Season 6 - Episode 3 - Aired 2/16/2025

The team discover Asif, Mel, and Marty’s connections to the deceased, and bring Marty in. Secrets from the deceased's past come to light, and Jess reaches out to her sister.

Watch Now:AmazonApple TV
Episode 1
star
7.34
262 votes

#24 - Episode 1

Season 6 - Episode 1 - Aired 2/9/2025

When a spine is dredged out of Whitney Marsh, a new case begins for Jess and Sunny’s team at Bishop Street CID. Four potential suspects soon appear, each with secrets to hide.

Watch Now:Amazon
Episode 5
star
0.00
0 votes

#25 - Episode 5

Season 6 - Episode 5 - Aired 2/23/2025

Lies are uncovered, and suspects are taken into custody, but who's protecting who? Meanwhile, Jess plans a conversation with Steve.