116 user 10 critic


0:41 | Trailer
Police investigate when the body of a girl is found in a lake.


Mark Andrew, Ed Talfan
1,172 ( 120)




3   2   1  
2021   2019   2018  
1 win & 5 nominations. See more awards »





Series cast summary:
Sian Reese-Williams ...  DI Cadi John / ... 13 episodes, 2018-2019
Sion Alun Davies ...  DS Owen Vaughan 13 episodes, 2018-2019
Victoria Pugh ...  DSI Susan Lynn 13 episodes, 2018-2019
Nia Roberts Nia Roberts ...  Elin Jones 12 episodes, 2018-2019
Lowri Izzard ...  PC Mari James 12 episodes, 2018-2019
Garmon Rhys ...  PC Ryan Davies 12 episodes, 2018-2019
Sarah Tempest ...  Alys Mitchell 9 episodes, 2018-2019
Rhodri Meilir Rhodri Meilir ...  Dylan Harris 8 episodes, 2018
Gwyneth Keyworth ...  Megan Ruddock 8 episodes, 2018
Gillian Elisa Gillian Elisa ...  Iona Harris 7 episodes, 2018
Ian Saynor ...  Huw John 7 episodes, 2018
Elodie Wilton ...  Nia Harris 7 episodes, 2018
Melangell Dolma Melangell Dolma ...  Sam Shepherd 7 episodes, 2018-2019
Annes Elwy Annes Elwy ...  Mia Owen 6 episodes, 2019
Owen Arwyn Owen Arwyn ...  Alun Pryce 6 episodes, 2018
Steffan Cennydd ...  Connor Pritchard 6 episodes, 2019
Sion Eifion ...  Lee Williams 6 episodes, 2019
Bryn Fôn Bryn Fôn ...  Hefin Mathews 6 episodes, 2019
Lois Meleri-Jones ...  Lowri Driscoll 6 episodes, 2018-2019
Lois Elenid Lois Elenid ...  Beca Mathews 6 episodes, 2019
Lisa Victoria Lisa Victoria ...  Catrin Pritchard 6 episodes, 2019
Lara Catrin Lara Catrin ...  Lea Pryce 6 episodes, 2018
Megan Llyn Megan Llyn ...  Bethan John 6 episodes, 2018-2019
Ffion Dafis Ffion Dafis ...  Kelly Owen 6 episodes, 2019


The eight-part drama, filmed in Snowdonia, tells the story of detective DI Cadi John (Sian Reese-Williams), who returns to North Wales to care for her ailing father. However, 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. Written by AnonymousB

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User Reviews

Finally something with depth
21 July 2018 | by ikanboySee all my reviews

After all the Scandinavian noir rip offs and serial killer mythology it was nice to see a straight forward rendition of evil. A female detective with no quirks or neuroses, and a monster with a human face. It's not for the shallow hearted. It is necessarily slow, it is 3/4 in Welsh, and it is bleak in it's depiction of rural Wales. But it tells it 's story by blessedly avoiding all the usual serial killer tropes. No rituals, no symbols to be decoded, no need to call the FBI, and no psychological prattle about motive.It's not a whodunnit, or a whydoneit, just a head on depiction of the banality of evil. With a mother from Hades.

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Welsh | English

Release Date:

9 June 2018 (USA) See more »

Also Known As:

Hidden See more »

Filming Locations:

Wales, UK See more »

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