- Phil Brown - Frank Rawlinson
- Yvonne Furneaux - Suzanne de Fleury
- Peggy Thorpe-Bates - Lady Caroline Wells
- Edmund Willard - Concierge
- Edgar K. Bruce - Francois
- Susan Lyall Grant - Ginette Mallarmé
- Rachel Gurney - Marquise de Manton
- Julian Somers - Sergeant
- Hugo de Vernier - Prison Guard
- Paddy Brannigan - Citizen (uncredited)
- John More - Citizen (uncredited)
- Jim Brady - Drummer (uncredited)
- Fred Wood - Drummer (uncredited)
- Jack May - Citizen (uncredited)
- Alan Beaton - Major Domo (uncredited)
- Ned Lynch - Crewman (uncredited)
- Sybil Wise - Alice
- Eric Corrie - Sabot
- Peter O'Toole - First Soldier
- Clifford Buckton - Hempseed
- Ingeborg von Kusserow - Cecille (as Ingeborg Wells)
- Cyril Shaps - Bibot
- Harold Young - Durand
- Alfie Bass - Labourer
- Walter Horsbrugh - Baron de Rougement (as Walter Horsborough)
- Eric D. Henderson - Citizen (uncredited)
- Aileen Lewis - Citizen (uncredited)
- Alun Owen - First Guard (uncredited)
- Esme Percy - Blind Man
- Robert Bruce - Lord Fenton
- Philip Morant - Captain
- Wallace Bosco - Citizen (uncredited)
- Guy Standeven - Soldier (uncredited)
- Guy Standeven - Flunky (uncredited)
- Fred Machon - Guest (uncredited)
- Gordon Whiting - Harding
- Richard Bennett - George Hobson
- Allan Jeayes - Landlord (as Alan Jeayes)
- Allan Jeayes - Jellyband (as Alan Jeayes)
- Thea Gregory - Christine Hobson
- Thea Gregory - Christine Hobson (as Theo. Gregory)
- Victor Harrington - Party Guest (uncredited)
- Christopher Lee - Louis (uncredited)
- Michael Kelly - Prison Sergeant (uncredited)
- Joanna Duncan - Lady Arabella (uncredited)
- Joanna Duncan - Lady Arabella
- Patrick Halpin - Courtier (uncredited)
- Patrick Halpin - Prisoner (uncredited)
- Christopher Steele - Count Latour
- Brian Wilde - Sir Thomas Landers
- Otto Friese - Guard (uncredited)
- Otto Friese - Guest (uncredited)
- Robert Cawdron - First Agent
- Robert Cawdron - Chicon
- Denis Shaw - Biggs (as Dennis Shaw)
- Fred Davis - Guard (uncredited)
- Ian Fleming - Count Latour (uncredited)
- William Abney - John Adams
- Ginger Hall - Myra Rawlinson
- Dennis Edwards - Sir Reginald Compton
- Arnold Diamond - The Marquis de St Serven
- Johnny Rossi - Citizen (uncredited)
- Johnny Rossi - Soldier (uncredited)
- Johnny Rossi - Guard (uncredited)
- Alex Scott - Soldier
- Susan Richmond - Madame Tussaud
- Aidan Harrington - Citizen (uncredited)
- Aidan Harrington - Guard
- Aidan Harrington - Guard (uncredited)
- Louis Matto - Guard (uncredited)
- Fred Wood - Soldier (uncredited)
- William Franklyn - Jacques Fleury
- Simone Lovell - Renee Fleury
- Nicolette Bernard - Lady Ponsonby
- Arthur Dibbs - Major Domo
- Richard Duke - Guest (uncredited)
- Jack Hetherington - Guest (uncredited)
- Chris Adcock - Guard (uncredited)
- Chris Adcock - Guard/Thug (uncredited)
- Peggy Scott Sanders - Guest (uncredited)
- Sybil Arundale - Mrs. Burton
- Arthur Young - Jacques
- Christopher Toyne - Jean-Paul
- Chick Fowles - Soldier (uncredited)
- Chick Fowles - Footman (uncredited)
- Lesley Dudley - Antoinette
- Richard Rogers - Charles
- Nicola Braithwaite - Renee
- Mandy Harper - Berthe (as Amanda Coxell)
- Paul Williamson - Chauvelin's Agent
- Victor Platt - Captain (uncredited)
- George Spence - Citizen (uncredited)
- George Spence - Landlord (uncredited)
- Michael Hitchman - Assassin
- Peter Halliday - Sergeant
- Fred Haggerty - Citizen (uncredited)
- Fred Haggerty - Guard/Thug (uncredited)
- Fred Haggerty - Thug (uncredited)
- Fred Haggerty - Guard (uncredited)
- Raymond Rollett - Prison Sergeant
- Malcolm Knight - Boy
- Angela Kay - Guest (uncredited)
- Leonard Llewellyn - Guest (uncredited)
- Philip Stewart - Citizen (uncredited)
- Balbina - Colette
- Balbina - Collette Duclos
- Christopher Warbey - Boy (uncredited)
- Johnny Wyne - Citizen (uncredited)
- John Laurie - Dr. Dufay
- Grizelda Hervey - Lady Snatterthwaite (as Griselda Hervey)
- Ben Williams - Landlord
- Joan Maude - The Duchess of Northumberland
- Ivor Dean - First Agent
- Ivor Dean - 1st Agent
- Eric Lindsay - Antoine
- Greta Watson - Antoinette
- Gillian Ferguson - Elise (as Gillian Town)
- Nancy Nevinson - Madame Cassis
- Van Boolen - First Citizen
- Anthony Jacobs - Second Citizen
- Milton Rosmer - Banker Rothstein
- Milton Rosmer - Rothstein
- Patrick Troughton - Sir Andrew Ffoulkes (as Pat Troughton)
- Patrick Troughton - Sir Andrew Ffoulkes
- Renee Goddard - Madeleine Delong
- Nicholas Bruce - Captain Delong
- Jimmy Ray - Jean
- Thomas Heathcote - Raoul
- Walter Rilla - The Father Guardian
- Peter Fontaine - The Sergeant
- Joe Phelps - Landlord (uncredited)
- Paddy Ryan - Monk (uncredited)
- Rodney Diak - Lord Larkin
- Jean Aubrey - Rachelle Rothstein
- Diane Aubrey - Lady Georgina
- Celia Hewitt - Arabella Macdonald
- Richard Pearson - Jack Williams
- Conrad Phillips - Latour
- Neal Arden - Higgins
- Clem Lister - Wolfe (as Clement Lister)
- Howell Davies - Stiles (as Howell Davis)
- Bill Horsley - Footman
- Jack May - Citizen (uncredited)
- Elvi Hale - Jeanette
- Roger Delgado - Andre
- Reginald Beckwith - The Tax Collector
- Michael Ripper - Elbeuf
- Janet Burnell - Madame Elbeuf
- Alexander Gauge - Prince of Wales
- Monti DeLyle - Second Agent (as Monte de Lyle)
- Maureen Connell - Princesse Melanie de Monsantes
- Stuart Mitchell - The Labourer
- Michael Collins - Messenger
- Michael Collins - Second Soldier
- Jimmy Thompson - First Coachman
- Harry Alan Towers
Lucie Mannheim interpreta a Comtesse la Valliere en la serie.
John Laurie hace el papel de Dr. Dufay.
Christopher Lee interpreta a Louis (uncredited) en la serie.
Marius Goring hace el papel de Sir Percy Blakeney / The Scarlet Pimpernel.
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