- Imogen Mackie Walker - Sigi Gunderson
- Kate Dickie - DCI Diane Oban
- Saskia Ashdown - Sam Decosta
- Caroline Guthrie - Isla Hendry
- Gavin Jon Wright - Finlay Morris
- Christy O'Donnell - Danny Hendry
- Kirsty Strain - Trish Hendry
- Anna Russell-Martin - Mandy Howson
- Hannah Donaldson - Ms Hill
- Shona McHugh - Denise
- Tam Dean Burn - PS Tam Glenn
- Marnie Baxter - Karina Williams
- Gerry Lynch - Grant Kidd
- Christopher Dane - Per Gunderson
- Shauna Macdonald - Liz Dunbar
- Hannah Jarrett-Scott - Cheryl
- Kim Allan - Heidi Greenshields
- Moyo Akandé - Mel Hetherington
- Martin Bell - Stuart Straney
- Lewis Howden - Rab Sterling
- Paul McCole - Mitch McAskill
- Dyfan Dwyfor - Neil Kelly
- Charlene Boyd - Siobhan Kelly
- Paul McGann - Jake Strathearn
- Andy Clark - Adie McAndrews
- Gavin Mitchell - Lachie Nevin
- Michael Abubakar - Graham Kennedy
- Millicent Wong - Ming Mei Zhao
- Aisha Toussaint - Evelyn Bailie
- Kevin O'Loughlin - Duty Solicitor
- Kevin O'Loughlin - James Hyndman
- Robert Jack - Fraser Clanahan
- Gail Watson - Maggie Fisher
- Hilary Maclean - Gaynor Gilbride
- Anita Vettesse - Carmela MacGowan
- Mel Raido - Agamemnon 'Mem 'Yiannopoulos
- Christian Ortega - Gio MacGowan
- Martin Quinn - Syd
- Bhav Joshi - Veer Talwar
- Sophie Sloan - Maddie McAndrews
- Susannah Laing - Taylor Mackie
- Thoren Ferguson - Lee Tanner
- Vivien Taylor - Leila
- Rebecca Root - Alex Carrigan
- Cora Bissett - Astrid McAndrews
- Patricia Panther - Justine Dunn
- Elysia Welch - Kimi Blake
- Pal Aron - Rihan Harijan
- Joe Rising - Richie McAvoy
- Martin Pemberton - Jaden Stanton
- Varada Sethu - DC Harper Weston
- Billy Mack - Bruce Kerr
- Ryan Bown - Andros Bakas
- Steven Duffy - Billy Gleeson
- Laura Ferries - Briony Craig
- Shereen Cutkelvin - January Deacon
- Russ Bain - Greg Connolly
- Jessica Hardwick - Katherine Hyde
- Andrew Still - Ross Kincaid
- Seylan Baxter - Senga McCauley
- Matt Costello - Salty Stewart
- Angela Costello - Chris Gray
- Ryaan Ali - Qaiyum Das
- Jenny Whiffen - Celeste Muirhead
- Grant O'Rourke - Oliver Forbes
- Edward Corrie - Fergus Gordon
- Sven Henriksen - Magnus Strandhed
- Lesley Harcourt - Louise Keanny
- Dom Watters - Casper McCray
- Andrew Watson - Geoff McInver
- Helen Katamba - Remi Lennox
- James Anthony Pearson - Lance Wallace
- Gabriel Quigley - Nell Dwight
- Maryam Hamidi - Dana Ashraf
- Jonathan Watson - Gary Nair
- Lisa Livingstone - Amanda Marsh
Nicola Walker interpreta a DI Annika Strandhed en la serie.
Jamie Sives interpreta a DS Michael McAndrews en la serie.
Katie Leung interpreta a DC Blair Ferguson en la serie.
Silvie Furneaux interpreta a Morgan Strandhed en la serie.
Capítulo disponible en las siguientes plataformas:
