- Turlough Convery - Bear
- Owen McDonnell - Niko Polastri
- Danny Sapani - Jamie
- Steve Pemberton - Paul
- Edward Bluemel - Hugo
- Camille Cottin - Hélène
- Kirby - Elena Felton
- Robert Gilbert - Yusuf
- Anjana Vasan - Pam
- Natallia Bulynia - Yula
- Holly Irgen - Detective
- Remo Girone - Cesare Greco
- Giulia Patrignani - Girl In Ice Cream Parlour
- Edyta Budnik - Kasia Molkovska
- Ania Marson - Ethel Rubynovitch
- Paolo D Bovani - Leoluca
- Nadia Mayer - Cesare Greco's Wife
- Charlyne Francis - Reception Nurse
- Sally Reeve - Nurse Watkins
- Will Haddington - London Waiter
- Charlie Hamblett - Sebastian
- David Bertrand - Jerome
- Huw Parmenter - Senior
- Stefanie Müller - Nicole Moreaux
- Aurélie Meriel - Carla De Mann
- Topher Collins - Police Officer
- Simon Chin - Zhang Wu
- Barbara Sotelsek - Hot Medica Receptionist
- Julian M. Deuster - Man in Hot Medica Reception
- Susie Trayling - Pamela
- Anatole Taubman - Weber
- Lobo Chan - Jin Yeong
- Coline Atterbury - Berlin Shop Assistant
- Edward Akrout - Diego
- Jan Carey - Veronica Hill
- Billy Matthews - Dominik Wolanski
- Irina Kara - Head Guard
- Ken Nwosu - Max Sanford
- Olivia Ross - Nadia
- Elina Alminas - Prison Guard 1
- David Agranov - Dr. Marat
- Larissa Kouznetsova - Prison Guard 2
- Rinat Khismatouline - Leon
- Viorica Bantas - School Receptionist
- Andrew Byron - Anton
- Andrei Zayats - Concierge
- Susan Lynch - Anna
- Aaron Vodovoz - Prison Guard 3
- Simon Thorp - Greg Richardson
- Michael Hanratty - Supermarket Cashier
- Diana Payan - Julian's Mother
- Claire Vousden - Supermarket Woman
- Thomas Jeand'heur - TCA Officer
- Mohamed Badissy - Taxi Driver
- Terrence Amadi - Security Guard
- André Refig - Paris Doctor
- Luke de Woolfson - British Dad
- Barbara Flynn - Julia
- Elena Saurel - Woman at Train Station
- Julian Barratt - Julian
- Nickolas Grace - Larry
- Michael Akinsulire - Jordan
- Tom Ward-Thomas - Legoland Receptionist
- Zoë Wanamaker - Helen Jacobson
- Amelia Hoy - Peel HQ Secretary
- Richard Pryal - Peel Lawyer
- Zoë Pastelle Holthuizen - Dutch Hipster
- Roeland Fernhout - Markus
- Annelies Appelhof - Sarah (Markus' Wife)
- Arian Nik - Jay
- Jung Sun den Hollander - Jin / The Ghost
- Hugo Nicholson - Geordie Stag
- Wendy Vrijenhoek - Woman in Cafe
- Aidan Kelly - Charles
- Emma Josten - Sex Worker #1
- Ethan Kai - Tony
- Andy Secombe - Eric
- Shannon Tarbet - Amber Peel
- Mike Reus - AIVD Officer
- Geff Francis - John
- Doortje Kleinrensink - Sex Worker #2
- Tom Scurr - Journalist
- David Cann - Len
- Jonathan Huisman - Drug Dealer
- Nigel Betts - Quartermaster
- Thomas Kuratli - Club DJ
- Laura Bayston - Babs
- Basienka Blake - Marie
- Phil McKee - Iain
- Cat Simmons - Carleen
- Emma Pierson - Gemma
- Andrea Tivadar - Young Woman
- Austin Hardiman - Tommy
- Marko Leht - Ivan
- Renars Latkovskis - Gregor
- Tomi May - Danny
- Maria McErlane - Diane
- Dominic Mafham - Charles Kruger
- Rebecca Saire - Bertha Kruger
- Vincent Ebrahim - Mike
- Oliver Cotton - Maciek
- Hiftu Quasem - Hotel Receptionist
- Oleg Mirochnikov - Detention Center Psychiatrist
- Sam Douglas - American Golfer
- Tom Cotcher - Taxi Driver
- Kate Bracken - Dr. Greer Barrie
- Karina Fernandez - Sharon
- Alexandra Roach - Rhian
- Jack Chissick - Bruce Fletcher
- Ayoola Smart - Audrey
- Ryan Donaldson - Barman
- Imogen Daines - Young Carolyn
- Louis Bodnia Andersen - Karl
- Nigel Cooke - Dickie
- Pano Masti - Camilo
- Stacy Thunes - Karolina
- John Keogh - Oliver
- Anna Maria Everett - Benita
- Sebastian Abineri - Rustem
- Caroline Loncq - Annie
- Alex Dower - Luis
- Branko Tomovic - Elmir
- Wanda Opalinska - Karolina
- Wanda Opalinska - Klaudia
- Kirsty Averton - Sophie
- Steve Oram - Phil
- Cecilia Noble - Barbara
- David Moorst - David
- Robert Luckay - Milos
- Manpreet Bachu - Elliot
- Rene Costa - Russian Chess Player
- A.k. Steppa - Security Guard
- Ventsislav Yankov - 1974 Coach
- Carmen Montero - Spanish Bride
- Carlos Mendoza - Wedding Guest #1
- Namju Go - Restaurant Owner
- Yasmin Al-Khudhairi - Shop Assistant
- Carolina Valdés - Spanish Shop Owner
- Melanie Beckley - Rehab Receptionist
- Tiffany Ceri - Bus Commuter
- Kishore Bhatt - MI6 Agent
- Sanj Surati - Passerby
- Sunny Yeo - Waitress
- Chan Woo Lim - Kitchen Worker #2
- Ștefan Iancu - Felix
- Roy Beck - Kenny's Uncle
- Eulàlia Ballart - Pianist
- Elisabeth Bonjour - Nanny
- Don Gallagher - Parfumier
- Alexander Hanson - Henrik
- Esther Hall - Valerie
- Arnau Gol-Karsunke - Pianist's Husband
- Doug Berry - Celebrating Banker
- Anita Poddębniak - Milena
- Irina Antonie - Bartender
- Dimitrij Schaad - Fyodor
- Predrag Bjelac - Grigoriy
- Rob Feldman - Pyotr
- Evgenia Dodina - Tatiana
- Virginia Rogin - Nadege
- Lia Sinchevici - Yula's Friend #1
- Cristina Casian - Yula's Friend #2
- Rada Ixari - Cow Judge
- Ion Grosu - Irina's Mum's Boyfriend
- Ancuta Breaban - Publicist
- Patrick Loh - Tourist
- Tiago Martins - Commuter
- Andrew Novell - Bad Breath Alan
- Raj Awasti - Bridge Player
- Raj Awasti - Supermarket Husband
- Daan Aufenacker - Rijksmuseum Security Guard
- Elena Mazzon - Hotel Receptionist
- Michel Alexandre Gonzalez - Man in Restaurant
- Gintare Beinoraviciute - Passerby
- Kateryna Globa - Waitress
- Monica Lopera - Fernanda
- Michael Golab - Caretaker
- Marek Oravec - Hans
- Claudia Newman - Frederique
- David Haig - Bill
- Haruka Kuroda - Keiko Pargrave
- Marie-Sophie Ferdane - Gunn
- Anton Lesser - Robert
- Josh Zaré - Darren
- Robert Lonsdale - Donnie
- Dimeji Ewuoso - Femi
- Matthew D'Arcy - Adrian
- Lee Byford - Truck driver (uncredited)
- Ingvar E. Sigurðsson - Lars
- Laurentiu Possa - Vlad
- Lati Gbaja - Hotel Guest (uncredited)
- Patrick Doran - Commuter
- Lee Morris
- Andrew Chapman
- Lynn Horsford
- Sally Woodward Gentle
- Damon Thomas
- Sandra Oh
Lobo Chan interpreta a Jin Yeong en la serie.
Jodie Comer interpreta a Villanelle en la serie.
Fiona Shaw hace el papel de Carolyn Martens.
Kim Bodnia interpreta a Konstantin Vasiliev en la serie.
Camille Cottin interpreta a Hélène en la serie.
Robert Gilbert interpreta a Yusuf en la serie.
Anjana Vasan interpreta a Pam en la serie.
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