(in credits order)
- Fred West(archive footage)
- Rosemary West(archive footage)
- Brian Leveson(as Sir Brian Leveson)
- Sasha Wass(as Sasha Wass KC)
Rest of cast listed alphabetically
- John Bennett(archive footage)
- Paul Britton(as Professor Paul Britton)
- Scott Canavan(archive footage)
- Alison Chambers(archive footage)
- Richard Ferguson(archive footage) (as Richard Ferguson QC)
- Bernard Knight(archive footage) (as Professor Bernard Knight CBE)
- Darren Law(archive footage)
- Janet Leach(archive footage)
- Ann McFall(archive footage)
- Juanita Mott(archive footage)
- Caroline Owens(archive footage)
- Lucy Partington(archive footage)
- Hazel Savage(archive footage) (voice)
- Charmaine West(archive footage)
- Rena West(archive footage) (as Catherine 'Rena' Costello)
- Stephen West(archive footage)
- David K. Whittaker(archive footage) (as Dr. David Whittaker)
