- Gerard Miller - Alan Killick
- Stephen Walters - Thomas Malone
- Fiona Bell - Donna Killick
- Lewis Howden - Sgt Billy McCabe
- Anneika Rose - Maggie Kean
- Brian Cox - Magnus Bain
- Gemma Chan - Hattie James
- Alexander Morton - Joseph Wilson
- Sandra Voe - Mima Wilson
- Claire Rafferty - Anna Haldane
- Lindy Whiteford - Jackie Haldane
- James Greene - Andrew Haldane
- Martin Wenner - Professor Paul Berglund
- Geraldine Alexander - Gwen James
- Sophie Rundle - Sophie
- Finn den Hertog - Drew
- Rebecca Benson - Sally Henry
- Anne Kidd - Cora McLean
- Sophia Carr-Gomm - Catherine Ross
- Chris Reilly - Alan Isbister
- Cara Kelly - Margaret Henry
- Frances Grey - Jess Collins
- Mathew Zajac - Alex Henry
- Stewart Porter - Sgt. Billy McBride
- Anthony Flanagan - Euan Ross
- Tunji Kasim - Hugo Scott
- Gowan Calder - Solicitor
- Jordan Young - Brian Bruce
- David Hayman - Joe Dalhousie
- Nina Sosanya - Willow Reeves
- Alex Norton - Cameron Watt
- Kari Corbett - Evie Watt
- Iain Robertson - Jerry Markham
- Clive Russell - Adam Markham
- Gerda Stevenson - Maria Markham
- Neil McKinven - Andy Belshaw
- Forbes Masson - Reg Gilbert
- Henry Pettigrew - Iain Redford
- Steven Cree - John Henderson
- Leanne Best - Annabel
- John Lynch - Frank Blake
- Leigh Biagi - Anna Blake
- Anthony Howell - Peter Latimer
- David Ireland - Finlay Caulfield
- Keith Ramsay - Joe Blake
- Marnie Baxter - Jenny
- Marnie Baxter - Jenny Belshaw
- Susan Vidler - Isobel Tulloch
- Lorne MacFadyen - Angus Tulloch
- Michael Nardone - Donnie Tulloch
- David Annen - Bill Warren
- Paksie Vernon - Gina Bradley
- Bill Paterson - James Perez
- Julie Hale - Tessa Warren
- Sara Vickers - Leanne Randall
- Ciarán Hinds - Michael Maguire
- Andrew Rothney - Robbie Morton
- Anna Chancellor - Phyllis Brennan
- Struan Rodger - Alec
- Saskia Reeves - Freya Galdie
- James Cosmo - Arthur McCall
- Fletcher Mathers - Bridal Shop Owner
- Jack Greenlees - Craig Cooper
- Archie Panjabi - Asha Israni
- Alec Westwood - Superintendent Sandison
- Andrew Watson - Andy
- Allison McKenzie - Gail Callahan
- Sean McGinley - Drew McColl
- Amy Lennox - Sally McColl
- Sophie Stone - Jo Halley
- Alison Peebles - Vicky Kirkland
- Alison Peebles - Librarian
- Steven McNicoll - Radio DJ
- Jimmy Chisholm - Alec MacBay
- Hannah Donaldson - Meg Hamilton
- Michael Moreland - Benny Ray
- Carolin Stoltz - DI Anke Strøm
- Arnmundur Ernst Björnsson - Lars Bleymann
- Joi Johannsson - Andreas Hagan
- Ida Elise Broch - Trine
- Hege Schøyen - Nina Søderland
- Kåre Conradi - Agent Nielsen
- Eldar Skar - Division Organiser
- Jim Sturgeon - Ronald Haldane
- Jim Sturgeon - Alex Galbraith
- Nathan Welsh - Robert Downing
- Eleanor Matsuura - DI Jessie Cole
- Tony McGeever - DS Ian Jackson
- Jamie Michie - Lowrie
- Victoria Balnaves - Callum's Mum
- Ralph Riach - Man at the Beach
- Ali Craig - Andrew
- Kate Donnelly - Grace
- Colette O'Neil - Bella
- Martin McCardie - Plant Manager
- Bryan Larkin - Gunman
- Michael Dylan - Martin the Hospital Porter
- Siu Hun Li - Ferry Chef
- John Paul Hurley - Neville
- John Stahl - Eric the Boatman
- Edward Corrie - Ben Brennan
- Liam Brennan - Mike Gillan
- Mark Cox - Tommy Monro
- Crispin Letts - Head Teacher
- Barbara Rafferty - Alice
- Finlay Welsh - George
- Gail Watson - Mary
- Gail Watson - Mary Hunter
- Paul Donnelly - Arthur's Heavy
- Caroline Guthrie - Mrs Whelan
- Reanne Farley - Mum
- Kevin Mains - DS Iain Boyd
- Ace Bhatti - Calvin Sarwar
- Gavin Jon Wright - Brian McDade
- Gaylie Runciman - Crisis Worker
- Sean Hay - Arthur's Heavy
- Sandy Welsh - Calvin's Lawyer
- Gregor Firth - Prison Officer
- Daniel Stisen - Henrick
- Lorn Macdonald - Jamie Hayes
- Owen Whitelaw - Prentice Hayes
- Tracy Wiles - Carla Hayes
- Isabelle Joss - Catrina
- Conor McCarry - PC Alex Grant
- Robin Laing - Gavin Laird
- Catherine Walker - Alice Brooks
- Annie Louise Ross - Agnes Moffat
- Annie Louise Ross - Mary Perez
- Derek Riddell - Chris Brooks
- Rakie Ayola - Olivia Lennox
- Ryan Fletcher - Calum Dunwoody
- Frances Mayli McCann - Niki
- Angus Miller - Donnie
- Olivia Barrowclough - Trish
- Kirsty Stuart - Morag Dunwoody
- John Kazek - Aaron McGuire
- John Kazek - Paul Kiernan
- Kate Dickie - DI Sam Boyd
- John Kazek - Paul Kiernan / Aaron McGuire
- Jenni Keenan-Green - Claire McGuire
- Itxaso Moreno - Caz
- Therese Bradley - Andrea Doyle
- Robert Cavanah - Graeme Benson
- Iain MacRae - Minister
- Benny Young - James Perez
- Helene Maksoud - Rasha Nassan
- Sharif Dorani - Nazir Nassan
- Cora Bissett - Eve Galbraith
- Jayne McKenna - Fiona Bedford
- Kate Bracken - Lynda Morton
- Thoren Ferguson - Eamon Gauldie
- Shona McHugh - Merran Galbraith
- Lewis Gribben - Fraser Creggan
- Alec Newman - Niven Guthrie
- Lois Chimimba - Carrie McAndrew
- Andy Clark - Mick Muir
- Nebli Basani - Curtis Galt
- Stephen McCole - Logan Creggan
- Lucianne McEvoy - Meg Pattison
- Rufus Wright - Dr Darren Bedford
- Frank Gilhooley - Connor McKay
- Shonagh Price - Sister Carolyn
- Sandy Batchelor - Struan Guthrie
- John Buick - Maurice Ross
- Anita Vettesse - Angela Muir
- Anne Lacey - Ida Harrison
- Don Gallagher - Deputy Chief Constable
- Dawn Sievewright - Nicole Waldron
- Gordon Brown - Cameron Waldron
- Alexandra Finnie - Clana
- Laurie Brett - Alison Woods
- Anthony Strachan - Ally Flett
- Stuart McQuarrie - Murry Rankin
- Sorcha Groundsell - Bryd Fleming
- Shauna Macdonald - Rachel Cairns
- Patrick Robinson - Lloyd Anderson
- Grant O'Rourke - Jamie Narey
- Andrew Whipp - Danny Cairns
- Eubha Akilade - PC Lorna Burns
- Keith Fleming - Gregg Flett
- Jade Ogugua - Carol Anne Mané
- Pauline Turner - Sheena Davidson
- Billy Mack - Granton Davidson
- Simone Lahbib - Jill Stevens
- Jessica Hardwick - Lynn Henderson
- Laura Cairns - DCI Melanie Reid
- Ladi Emeruwa - Martin Otina
- Ladi Emeruwa - Martin Otina / DI Calvin Walker
- Cameron Jack - Tony Walker
- Karen Westwood - Aileen Fleming
- Bradley Connell - Liam
- Brian Ferguson - DI Fraser Brooks
- Julie Hannan - Jean Morrow
- Marjolein Robertson - Woman on Beach
- Kim Chapman - Charlotte
- Joseph Thompson - Philip Remis
- Joe Bolland - DC Jack Hurley
- Arnas Fedaravicius - Lukas Nowak
- Karl Collins - DCI Thomas Coombes
- Don Gilet - John Howell
- Tibu Fortes - Harry Lamont
- Lorraine McIntosh - Heather Bain
- Dawn Steele - Stella Quinn
- Barry O'Connor - Kieran Quinn
- Phyllis Logan - Grace Bain
- Russ Bain - Bobby Bain
- Neil Pendleton - Neil Bain
- Gemma Laurie - Rosemary Strachan
- Ian Dunnett Jnr - Liam Kenmuir
- Jamie Sives - Cal Innes
- Simon Tait - Ronnie Tulloch
- Francesco Piacentini-Smith - Gerry Bryce
- Jo Cameron Brown - Maura Watt
- Sandy Grierson - Peter Ayre
- Sean Brown - Ben Jardine
- Kevan MacKenzie - James Innes
- Bamshad Abedi-Amin - Azir Sadat
- Manjinder Virk - Farida Sadat
- Nina Toussaint-White - Amma Calder
- Dylan Blore - Tom Knox
- Caroline Deyga - Nursery Nurse (Sally)
- Jennifer Black - Jean Ferguson
- Helen Mackay - Nurse
- Rosie Graham - Young Calder
Sandra Voe hace el papel de Mima Wilson.
Alex Norton interpreta a Cameron Watt en la serie.
James Cosmo interpreta a Arthur McCall en la serie.
Sean McGinley interpreta a Drew McColl en la serie.
Gerda Stevenson interpreta a Maria Markham en la serie.
Brian Cox hace el papel de Magnus Bain.
Ashley Jensen interpreta a DI Ruth Calder en la serie.
Alison O'Donnell hace el papel de DS Alison 'Tosh' McIntosh.
Steven Robertson interpreta a DC Sandy Wilson en la serie.
Capítulo disponible en las siguientes plataformas:
