- Elizabeth Berrington - Lucy Best
- Anna Devlin - Primrose Chattoway
- Kiran Sonia Sawar - Harriet Kaur
- Ben Chaplin - Frank Mundi
- Denis O'Hare - Dr. Edmund Hague
- Ella Smith - Désirée Blodgett
- Nick Frost - Declan 'Beggar King' Orrun
- Vinnie Heaven - Nimble Jack
- Dan Mersh - Mr. Hapslich
- Philippa Dunne - Mrs. Hapslich
- Rachel Summers - Katherine Cousens
- Abra Thompson - Hugo's Housemaid
- Skye Lourie - Katie (Chorus Girl)
- Jay Simpson - Tunnel Foreman
- Martin Bishop - Dr. Beldon
- Nesba Crenshaw - Mrs. Beldon
- Matt Butcher - Devil / Baritone
- Nick Bartlett - Drunk Man
- Henri Charles - Newspaper Boy
- Angus Brown - Man (Beggar King's Henchman)
- Alex MacQueen - Mr. Oldenham
- Angela Ashton - Rosa
- Deborah Moore - Fancy Lady
- James Coombes - Older Gentleman
- Rosalind Adler - Society Lady
- Michael James - Teen Boy
- Finn Bennett - Pink Shirt
- Andy Burse - Pocket Square
- Matt Brewer - Man
- Alison Pargeter - Kindly Old Woman
- Ruth Sheen - Mrs. Beechum
- Dan Tetsell - Phone Line Engineer
- Jack Wheatley - Nigel Blodgett
- Jordan Long - Guard
- Phil Zimmerman - Signalman
- David Garrick - Wenimar Kroos 'Repeater'
- Martyn Ford - Nicolas Perbal 'Odium'
- Mark Benton - The Colonel
- Sylvie Briggs - Clara
- Andrew Havill - Douglas Broome
- Rupert Vansittart - Lord Broughton
- George Dawson - Hague's Assistant
- Madeleine Wilson - Lady Whisper
- Nicholas Farrell - Prince Albrecht
- Tim Steed - Lord Allaven-Tyne
- Tim Bentinck - General Pecking
- Lola Dubus - Dominique
- Jack Gouldbourne - Hanging Watcher 3
- Mofetoluwa Akande - Katherine Cousens
- Alex Forman - Huge Purist
- Christopher Dunne - Club Butler
- Hector Moss - Fiddle Player
- Marcus Garvey - Gordy (Reporter)
- Marc Bannerman - Bowler Hat
- Ed Eales White - Foreman
- Paul Bentley - Judge
- Heather Coombs - Anxious Mother
- Simon Balcon - Hanging Watcher 2
- Lee Barnett - Jacobs (Massen Worker)
- Eleanor Tomlinson - Mary Brighton
- Jack Rolf - Warehouse Worker
- Paul Hamilton - Hanging Watcher 5
- Amanda Holt - Female Diner
- Will Brown - Police Officer
- Bill Hurst - Male Diner
- Mauro Montuschi - Italian Cook
- Grahame Fox - Crabby Cop
- Brett Allen - Tent Cop
- Sam Lathem - Mean Cop
- Chris Kyriacou - Guard 1
- Joe Reisig - Scarred Begger King Guard
- Nick Pearse - Guard 2
- Claudia Black - Stripe
- Domenique Fragale - Beth Cassini
- Pui Fan Lee - Su Ping Lim
- Okezie Morro - Crescent
- Ellora Torchia - Knitter
- John Macmillan - Byner
- Matthew Marsh - Major
- Rita Bernard-Shaw - Second Boot
- Ravi Aujla - Scientist
- Lee Armstrong - Varnum
- Daniel Hoffmann-Gill - Thomas True
- Nicola Sloane - Mama True
- Glen Davies - Dr. Campbell
- Terence Frisch - Solicitor
- Mark O'Sullivan - Orderly
- Abigail Thaw - Mrs. Hundley
- Stacha Hicks - Nurse #1
- Anna Munden - Nurse #2
- Freya Parker - Doris
- Belinda McGinley - "Young Stripe"
- Joss Whedon
- Ilene S. Landress
- Jane Allison Hooper
- Christopher Newman
- Duncan Muggoch
- Douglas Petrie
- Tim Kimmel
- Mark Isham
- Evyen Klean
- Kevin Valentine
- Brett Voss
- Richard Dyer
Christopher Dunne interpreta a Club Butler en la serie.
Rupert Vansittart interpreta a Lord Broughton en la serie.
Laura Donnelly interpreta a Amalia True en la serie.
Ann Skelly hace el papel de Penance Adair.
Olivia Williams interpreta a Lavinia Bidlow en la serie.
James Norton interpreta a Hugo Swann en la serie.
Tom Riley hace el papel de Augustus 'Augie' Bidlow.
Pip Torrens interpreta a Lord Gilbert Massen en la serie.
Rochelle Neil hace el papel de Annie 'Bonfire' Carbey.
Amy Manson hace el papel de Maladie.
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