Name	Known for
Sian Reese-Williams DCI Cadi John DCI Cadi John See fewer	Hidden (2018)
Sion Alun Davies DS Owen Vaughan (as Siôn Alun Davies) DS Owen Vaughan (as Siôn Alun Davies) See fewer	Hidden (2018)
Annes Elwy Mia Owen Mia Owen See fewer	Little Women (2017)
Steffan Cennydd Connor Pritchard Connor Pritchard See fewer	The Pembrokeshire Murders (2021)
Sion Eifion Lee Williams Lee Williams See fewer	Hidden (2018)
Nia Roberts Elin Jones Elin Jones See fewer	Cashback (2006)
Lowri Izzard PC Mari James PC Mari James See fewer	Hidden (2018)
Garmon Rhys PC Ryan Davies PC Ryan Davies See fewer	Hidden (2018)
Victoria Pugh DSI Susan Lynn DSI Susan Lynn See fewer	Hidden (2018)
Sarah Tempest Alys Mitchell Alys Mitchell See fewer	Hidden (2018)
Bryn Fôn Hefin Mathews Hefin Mathews See fewer	Hidden (2018)
Lois Elenid Beca Mathews Beca Mathews See fewer	Hidden (2018)
Lisa Victoria Catrin Pritchard Catrin Pritchard See fewer	Hidden (2018)
Jac Jones Liam Pritchard Liam Pritchard See fewer	Hidden (2018)
Sion Pritchard James Rhys James Rhys See fewer	The Indian Doctor (2010)
Ffion Dafis Kelly Owen Kelly Owen See fewer	Hidden (2018)
Dyfrig Evans Glyn Jones (credit only) Glyn Jones (credit only) See fewer	Hidden (2018)
Melangell Dolma Sam Shepherd Sam Shepherd See fewer	Hidden (2018)
Megan Llyn Bethan John Bethan John See fewer	Hidden (2018)
Brooke Morgan Baby Baby See fewer	Hidden (2018)
Colin Murtagh Police Officer (uncredited) Police Officer (uncredited) See fewer	The Courier (2020)
Dafydd Wyn Roberts William Jenkins (uncredited) William Jenkins (uncredited) See fewer	The Englishman Who Went Up a Hill But Came Down a Mountain (1995)