- Steven Meo - DI Lynne Harries
- Richard Corgan - DS Glyn Johnson
- Kyle Lima - DC Nigel Rowe
- Steffan Cennydd - Jack Wilkins
- William Thomas - DCI George Jones
- Suzanne Packer - Chief Constable Tyler
- Mabli Jen Eustace - Amy Wilkins
- Hywel Morgan - Prison Governor
- Francine Morgan - Parole Board Judge
- Joanna van Kampen - Parole Board Member 1
- Andrew MacBean - Parole Board Member 2
- Sue Cook - Self (archive footage) (uncredited)
- Rhys Parry Jones - Pub Landlord
- Edward Llewelyn - Sergeant
- Roger Evans - DCI Jim Morris (uncredited)
- Roger Evans - DCI Jim Morris
- Owen Teale - Gerard Elias QC
- Ian Saynor - Justice Sir John Griffith Williams
- Ioan Hefin - Mark Evans QC
- Anastasia Hille - Dr. Angela Gallop
- Jim Bowen - Self (archive footage) (uncredited)
- Jim Bowen - Self (voice) (archive footage) (uncredited)
- Simon Nehan - Craig
- Simon Nehan - Craig (uncredited)
- Sara Gregory - Leanne Dauncey
- Amy Morgan - Erin Davies
- Simon Armstrong - Oliver Wakefield
- Anita Reynolds - Court Usher
- Rhiannon Meades - Court Clerk
- Marc Evans
- Nick Stevens
Luke Evans interpreta a DCS Steve Wilkins en la serie.
Keith Allen interpreta a John Cooper en la serie.
Caroline Berry hace el papel de Pat Cooper.
Oliver Ryan hace el papel de Andrew Cooper.
Alexandria Riley hace el papel de DI Ella Richards.
Charles Dale hace el papel de DS Gareth Rees.
David Fynn interpreta a Jonathan Hill en la serie.
Capítulo disponible en las siguientes plataformas:
