- James Booth - Franz
- Patrick Troughton - Hanzler
- Delphi Lawrence - Baroness Ulbricht
- Robert Shaw - Peter von Breck
- Derek Waring - Louis
- André van Gyseghem - Grand Duke
- Tommy Duggan - Waldmann
- Alfred Burke - Captain Bolf
- Peter Swanwick - Hofer
- Sid James - Schaffner
- Joanna Dunham - Gretel
- Nadja Regin - Maddelena
- Richard Vernon - Merchant
- Alex Scott - Klaus
- Edwin Richfield - Maddeaux
- John Carson - Fritz
- Richard Bebb - Captain Huber
- Walter Gotell - Officer
- Ronald Leigh-Hunt - Jules Gunther
- Frazer Hines - Carl
- Christopher Lee - Prince Erik
- John Le Mesurier - Duke of Burgundy
- George Benson - Conrad
- Wilfrid Brambell - Josef
- Bruce Seton - Colonel Bullinger
- Henry Oscar - Dr. Klein
- Glyn Owen - Anton
- Michael Caine - Max
- Bryan Coleman - Count Heinemann
- John Howard Davies - Bruno
- John Howard Davies - Karl
- Ralph Michael - Quirini
- Michael Ripper - Schwarz
- Jack Watling - Ferdinand
- Charles Lloyd Pack - Herr Speckler
- Marjorie Rhodes - Aunt Maria
- Edward Judd - Trooper Strauss
- Edward Judd - Austrian Officer
- Peter Welch - Guard
- Lloyd Lamble - Colonel
- Jack Lambert - Judge Furst
- Peter Hammond - Captain Hofmanstahl
- Norman Mitchell - Frederick
- Frank Thornton - Tax Collector
- Frank Thornton - Heinburgher
- Ernest Milton - Judge Furst
- Willoughby Goddard - Gessler
- Willoughby Goddard - Landburgher Gessler
- Richard Rogers - Walter Tell
- Roy Purcell - Fritz
- Celia Hewitt - Gretel
- Jennifer Jayne - Hedda Tell
- Howard Lang - Schmidt
- Keith Pyott - Erlanger
- Keith Pyott - Hans
- Howard Pays - Major Augustin
- Ian Wallace - Father Abbot
- Jerry Verno - Petitpierre
- Richard Shaw - Tasker
- Olive McFarland - Hilde
- Arthur Skinner - Johann
- Hamlyn Benson - Gatekeeper
- Kevin Stoney - Heinrich
- Kevin Stoney - Strauss
- Harold Scott - Gaston
- Peter Bennett - Gruner
- Sheila Raynor - Josephine
- Marianne Benet - Dagma
- Derren Nesbitt - Sentry
- Derren Nesbitt - Martin
- Derren Nesbitt - Captain Werner
- Derren Nesbitt - Schulemburg
- Derren Nesbitt - Frederick
- David Davenport - Sergeant
- Graham Stewart - Hans
- Meadows White - Burgomaster
- Gerald Cross - Ludwig
- Anthony Parker - Soldier
- Charles Ross - Fritz
- Nigel Green - Fertog (The Bear)
- Nigel Green - The Bear
- Nigel Green - Fertog
- Richard Warner - Headman of Dosten
- John McCarthy - Emil
- John McCarthy - Heinz
- John McCarthy - Brother Jules
- Mary Webster - Marthe
- Norma Parnell - Tina
- Charles Houston - Paul
- Charles Houston - Weber
- Melissa Stribling - Countess von Markheim
- Willoughby Gray - Number One
- Willoughby Gray - Captain Frederick
- Derek Godfrey - Wolfgang
- Derek Godfrey - Burgomaster
- Richard Burrell - Max
- Colette Wilde - Ingrid Von Breck
- Roy Godfrey - Honest Karl
- John Salew - Colonel Wentzel
- Harriette Johns - Gertrude
- Scot Finch - Peter
- Julian Somers - Hugo
- Julian Somers - Kurt
- Leslie Perrins - Count Hegel
- Cyril Chamberlain - Vogel
- Monica Grey - Frau Anna
- Derek Aylward - Kramer
- David Blake Kelly - Von Eckenburg
- Stanley Van Beers - Apothecary
- Edward Evans - Hoffman
- Anthony Richmond - Hoffman's son
- David de Keyser - Karl
- John Maxim - Trooper Strauss
- John Maxim - Captain Markheim
- Susan Travers - Dina
- Norman MacOwan - Andreas
- Raymond Young - Aldo
- Peter Reynolds - Hilaire
- Ralph Smart
Michael Caine interpreta a Max en la serie.
Christopher Lee hace el papel de Prince Erik.
Sheila Raynor hace el papel de Josephine.
Conrad Phillips hace el papel de William Tell.
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