- Zrinka Cvitešić - Sara
- Josef Altin - Pavel
- Samantha Spiro - Detective Taylor
- Richard Cunningham - Danny's Lawyer
- David Hayman - Mr. Turner
- David Hayman - Mr Turner
- Charlotte Rampling - Frances
- Lorraine Ashbourne - Mrs. Turner
- Lorraine Ashbourne - Mrs Turner
- Nicolas Chagrin - Charles
- Harriet Walter - Claire
- Adrian Lester - Professor Marcus Shaw
- Riccardo Scamarcio - Doppelganger
- Tatsujiro Oto - Geisha
- Gintare Beinoraviciute - Clubber (uncredited)
- Neil Alexander Smith - Nightclub Doorman (uncredited)
- Kate Dickie - Editor
- Michaela Coel - Journalist
- Grant Stimpson - Danny's Boss
- Clarke Peters - The American
- Mark Gatiss - Rich
- Steffan Donnelly - Raphael
- Heronimo Sehmi - Club Staff
- James Fox - James
- Henry Goodman - Silversmith
- Sean McKee - Dealer
- Priyanga Burford - Clinician
- Priyanga Burford - Clinician (uncredited)
- Jay Benedict - Phone Voice (voice)
- Lizzy McInnerny - Danny's Mother
- David Meyer - Danny's Father
- Sam Kenyon - HIV Group Chair
- Louis Saint-Juste - Oldest Guy
- Matthew Stagg - Young Alex
- Nicola Grier - Agent in the Attic
- Chris Wilson - CID Officer (uncredited)
- Antonia Campbell-Hughes - Magician
- Jakob Verbruggen
- Tom Rob Smith
- Robert Sterne
- Hilary Salmon
- Polly Hill
- Tim Bevan
- Eric Fellner
- Robert Brazier
- Keefus Ciancia
- Ben Cross
- James Gregory
James Fox hace el papel de James.
Ben Whishaw interpreta a Danny en la serie.
Edward Holcroft interpreta a Alex en la serie.
Jim Broadbent hace el papel de Scottie.
David Hayman hace el papel de Mr. Turner.
Lorraine Ashbourne hace el papel de Mrs. Turner.
Capítulo disponible en las siguientes plataformas: