- Brian Vernel - Billy Wallace
- Fady Elsayed - Faz
- Colm Meaney - Finn Wallace
- Paapa Essiedu - Alexander Dumani
- Pippa Bennett-Warner - Shannon Dumani
- Waleed Zuaiter - Koba
- Aymen Hamdouchi - Hakim
- Garmon Rhys - Patrick
- Kwong Loke - Wong
- Constantine Gregory - Molotok
- Edward Apeagyei - Kwame
- David Bradley - Jim
- Florist Bajgora - Besmir
- Mark Perry - Gordon Peters
- Lee Charles - Len
- Rhys Meredith - Man Under Bucket
- Serhat Metin - Turkish Truck Driver
- Alexia Traverse-Healy - Dr. May
- Javed Khan - Mr. Ahmed
- Aiste S. Gram - Agnesa
- Shervin Alenabi - Agrin
- Henry Felix - Dylan
- Lili Miller - Auction House Assistant
- Will Hislop - Banker
- Gordon Alexander - Cole
- Shaq B. Grant - Raheem
- Alina Serban - Diah
- Adrian Bower - Mark
- Gwynfor Jones - Maitre'd
- James Harkness - Kev
- Eva Jane Willis - Natalie
- Aled Ap Steffan - Darren Edwards
- Darren Evans - Ioan
- Richard Harrington - Mal
- Caroline Lee-Johnson - Evie
- Andrew Laithwaite - Ulrik
- William Thomas - Frank
- Mark Lewis Jones - Kinney Edwards
- Sophie Evans - Young Daughter
- Craig Canning - Matthew
- Ella Peel - Charlotte
- Jordan Peters - Musa
- Samuel Mak - Liam
- Ioan Hefin - Albert
- Laura Sofia Bach - Tove Fransen
- Emmett Scanlan - Jack O'Doherty
- Aksel Üstün - Hekar
- Rosy Benjamin - Detective Inspector
- Pavel Douglas - Adige CEO
- Frances Tomelty - Niamh
- Jack Donoghue - Zac
- Nebli Basani - Tariq
- Lobo Chan - Jin Li
- Richard Pepple - Mosi
- Sharon Morgan - Ingrid Hansen
- Pamela Nomvete - Serwa
- Mads Koudal - Leif Hansen
- Eri Shuka - Mirlinda Dushaj
- David Avery - Anthony
- Ian Beattie - Colin
- Adam J. Bernard - Young Charlie
- Shaila Alvarez - Medic
- Parth Thakerar - Nasir Afridi
- Garry Cooper - John Harks
- Sarah Hewson - Sky News Anchor
- Olivier Richters - Duncan
- Arta Dobroshi - Floriana
- Arta Dobroshi - Floriana (uncredited)
- Tim McInnerny - Mr. Jacob
- Valene Kane - Jacqueline Robinson
- Jenny O'Leary - Kelly
- Asif Raza Mir - Asif Afridi
- Rory Nolan - Crank
- Victoria Broom - Melanie
- Taye Matthew - Danny Dumani
- Cornell John - Joseph Singer
- Cornell John - Joseph
- Jude Akuwudike - Charlie Carter
- Pete MacHale - Teenage Billy
- Pete MacHale - Young Billy
- Amanda Drew - Miss Kane
- Amanda Drew - Ms. Kane
- Salem Kali - Basem
- Yassine Mkhichen - Marco
- Andi Jashy - Afrim
- Rom Blanco - Tamaz
- Jake Curran - Lennie
- Ronan Raftery - Darragh
- Louis Dempsey - Killian
- Tim Berrington - Rutherford
- Jack Bennett - Interrogator
- Murat Erkek - Merwan
- Aziz Kemal - Rojan
- Lainey Shaw - Secretary
- Mihai Arsene - Salesperson
- Benjamin Wainwright - Raphael
- Tamar Baruch - Bibi Agostini
- Robert Ryan - Gangster
Lobo Chan interpreta a Jin Li en la serie.
Jake Curran interpreta a Lennie en la serie.
Orli Shuka interpreta a Luan Dushaj en la serie.
Sope Dirisu interpreta a Elliot Finch en la serie.
Joe Cole interpreta a Sean Wallace en la serie.
Lucian Msamati hace el papel de Ed Dumani.
Michelle Fairley hace el papel de Marian Wallace.
Narges Rashidi interpreta a Lale en la serie.
Brian Vernel hace el papel de Billy Wallace.
Fady Elsayed interpreta a Faz en la serie.
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