The BEST episodes of Hidden (2018)

Every episode of Hidden (2018) ever, ranked from best to worst by thousands of votes from fans of the show. The best episodes of Hidden (2018)!

Sian Reese-Williams stars as DI/DCI Cadi John in this detective drama series set in north Wales. Each series revolves around a different murder. The series, filmed in Bangor and Snowdonia, was initially broadcast in Welsh on S4C and was later shown by the BBC in a bilingual Welsh/English version.

Last Updated: 6/21/2025Network: S4CStatus: Ended
Episode 6
star
7.87
83 votes

#1 - Episode 6

Season 2 - Episode 6 - Aired 12/22/2019

DCI Cadi John and DS Owen Vaughan succeed in apprehending Mia, Lee and Connor, but there is only a hollow sense of victory.

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Episode 5
star
7.69
87 votes

#2 - Episode 5

Season 2 - Episode 5 - Aired 12/15/2019

Hefin discovers Sion Wells' body at the petrol station, meaning DCI Cadi John and DS Owen Vaughan now have to deal with two separate murders.

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Episode 7
star
7.64
172 votes

#3 - Episode 7

Season 1 - Episode 7 - Aired 2/18/2018

Cadi and Owen search for new evidence in Endaf's case, which was originally headed by Cadi's father Huw. Dylan works with Matthew at his yard. Megan tries connecting with Nia.

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Episode 8
star
7.61
161 votes

#4 - Episode 8

Season 1 - Episode 8 - Aired 2/25/2018

With Dylan on the run, the investigating team attempt to put together an exact timeline of his actions and find further evidence.

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Episode 4
star
7.61
87 votes

#5 - Episode 4

Season 2 - Episode 4 - Aired 12/8/2019

DCI Cadi John has to release Karl Lewis because of a lack of evidence. Mia, Connor and Lee cause trouble for Hefin, Beca and Sion at the petrol station.

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Episode 1
star
7.43
112 votes

#6 - Episode 1

Season 2 - Episode 1 - Aired 11/17/2019

After receiving an anonymous call leading police to the body of an old man who has been decaying for weeks, DCI Cadi John and DS Owen Vaughn are forced to work against the clock to find out the murderer's identity. This leads them into the shadows of the slate-strewn mountains of Blaenau Ffestiniog to unlock more dark secrets.

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Episode 3
star
7.42
179 votes

#7 - Episode 3

Season 1 - Episode 3 - Aired 1/21/2018

Marc is questioned by the police. Cadi avoids talking to her father or sisters about his condition. Megan tries to take catch up with her schoolwork but Ffion notices something's wrong. Sara visits Lea, Mali's sister.

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Episode 5
star
7.40
53 votes

#8 - Episode 5

Season 3 - Episode 5 - Aired 11/7/2021

News arrives at the police station that a body has been found, and Cadi and Vaughan reach a realization about the case.

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Episode 2
star
7.39
92 votes

#9 - Episode 2

Season 2 - Episode 2 - Aired 11/24/2019

DCI Cadi John and DS Owen Vaughan pay Karl Lewis a visit. Mia tries to draw Connor closer to her.

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Episode 6
star
7.38
165 votes

#10 - Episode 6

Season 1 - Episode 6 - Aired 2/11/2018

Cadi questions Endaf in prison about the murder he was convicted for. Owen reviews the older case files and receives a new missing persons report. Iona visits Megan.

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Episode 1
star
7.36
69 votes

#11 - Episode 1

Season 3 - Episode 1 - Aired 10/10/2021

When a man's body is discovered in a river, Cadi and Vaughan are called to investigate. Cadi faces a dilemma about her own future.

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Episode 6
star
7.36
50 votes

#12 - Episode 6

Season 3 - Episode 6 - Aired 11/14/2021

The sadness of the situation is obvious as Cadi interviews Sion ' and what will happen to Glyn in the future' Cadi reaches a decision about her own future. The end of an era in many ways.

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Episode 3
star
7.35
85 votes

#13 - Episode 3

Season 2 - Episode 3 - Aired 12/1/2019

The community comes together to pay its respects to Geraint Ellis. Mia succeeds in drawing Connor closer to her.

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Episode 4
star
7.32
60 votes

#14 - Episode 4

Season 3 - Episode 4 - Aired 10/31/2021

Cadi throws herself into her work and Sion receives some bad news about his own job. Sion demands some answers from Father McEwan.

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Episode 2
star
7.31
194 votes

#15 - Episode 2

Season 1 - Episode 2 - Aired 1/14/2018

Cadi and Owen investigate a possible link to another girl who disappeared. Megan hides her difficulties from friends and family. Dylan takes an interest in Lowri.

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Episode 5
star
7.30
165 votes

#16 - Episode 5

Season 1 - Episode 5 - Aired 2/4/2018

Cadi and Owen discover a possible connection to an old case, which Cadi's father investigated. Lowri tries to return to her normal routine.

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Episode 3
star
7.30
54 votes

#17 - Episode 3

Season 3 - Episode 3 - Aired 10/24/2021

Cadi and Vaughan interview Piotr, a Polish worker who is employed at the old hospital but he's reluctant to share any information with them. The sisters say goodbye to the house on the island.

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Episode 2
star
7.27
63 votes

#18 - Episode 2

Season 3 - Episode 2 - Aired 10/17/2021

Father McEwan check on Glyn to see how he's coping with what's happened ; this comes as a shock to Sion. Cadi has to face the fact that she's hurt someone who is important to her.

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Episode 4
star
7.21
174 votes

#19 - Episode 4

Season 1 - Episode 4 - Aired 1/28/2018

Dylan and Iona clash regarding Megan. Mari and Ryan continue the questioning procedure, but Mari deviates from protocol.

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Episode 1
star
7.13
276 votes

#20 - Episode 1

Season 1 - Episode 1 - Aired 1/7/2018

When the body of a young woman is found in a local river, it becomes obvious that sinister secrets lie within the stunning North Wales scenery. Cadi's world - and the world around her - is changed forever.

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