 | Frank Finlay | ... | Dr. Hans Kuperus (1 episode, 1966) |
| Michael Goodliffe | ... | Fraze Von Maldern (1 episode, 1966) |
| Annette Crosbie | ... | Nell (1 episode, 1966) |
| Lyndon Brook | ... | Detective Sergeant (1 episode, 1966) |
| Jeremy Spenser | ... | Karl Vorberg (1 episode, 1966) |
| Joss Ackland | ... | Bernard Jeantet (1 episode, 1966) |
| Betty Bascomb | ... | Madame Baron (1 episode, 1966) |
| Beryl Baxter | ... | Madame Fabien (1 episode, 1966) |
| Elizabeth A. Bell | ... | Helene (1 episode, 1966) |
| Hywel Bennett | ... | Gilles Mauvoisin (1 episode, 1966) |
| Jocelyn Birdsall | ... | Colette (1 episode, 1966) |
| Joby Blanshard | ... | Hippolyte (1 episode, 1966) |
| Kathleen Breck | ... | Babette (1 episode, 1966) |
| Michael Brennan | ... | Pessart (1 episode, 1966) |
| David Buck | ... | Charles Canut (1 episode, 1966) |
| James Bulloch | ... | Train attendant (1 episode, 1966) |
| Edward Burnham | ... | Hervineau (1 episode, 1966) |
| Clive Cazes | ... | Messenger (1 episode, 1966) |
| Nicolas Chagrin | ... | Valesco (1 episode, 1966) |
| Mary Chester | ... | Concierge (1 episode, 1966) |
| Madeleine Christie | ... | Gérardine Eloi (1 episode, 1966) |
| Ian Colin | ... | Count d'Estier (1 episode, 1966) |
| Cyril Cross | ... | Van der Cruyssen (1 episode, 1966) |
| Marty Cruikshank | ... | Corinne Malou (1 episode, 1966) |
| Alan Curtis | ... | Paul Fabien (1 episode, 1966) |
| Terence de Marney | ... | Février (1 episode, 1966) |
| Edward Dentith | ... | Jacques de Lamotte (1 episode, 1966) |
| Clive Dunn | ... | Monsieur Jaminet (1 episode, 1966) |
| Jessica Dunning | ... | Jeanne Papelier (1 episode, 1966) |
| Hamilton Dyce | ... | Maître LaRoche (1 episode, 1966) |
| Sandor Elès | ... | Blinis (1 episode, 1966) |
| Alex Farrell | ... | Postman (1 episode, 1966) |
| John Forgeham | ... | Victor (1 episode, 1966) |
| Roger Foss | ... | Albert (1 episode, 1966) |
| Thomas Gallagher | ... | Baron (1 episode, 1966) |
| David Garfield | ... | Insp. Favier (1 episode, 1966) |
| Christopher George | ... | Domb (1 episode, 1966) |
| Henry Gilbert | ... | Inspector Gordes (1 episode, 1966) |
| Marius Goring | ... | Monsieur Hire (1 episode, 1966) |
| Stewart Guidotti | ... | Pierre d'Estier (1 episode, 1966) |
| Peter Halliday | ... | Gaston (1 episode, 1966) |
| Michael Hawkins | ... | Dr. Sauvaget (1 episode, 1966) |
| Patricia Healey | ... | Jeane Jeantet (1 episode, 1966) |
| Joan Heath | ... | Madame Rinquet (1 episode, 1966) |
| Frederick Jaeger | ... | Vladimir (1 episode, 1966) |
| Noel Johnson | ... | Supt. Godot (1 episode, 1966) |
| Gemma Jones | ... | Antoinette Baron (1 episode, 1966) |
| Lila Kaye | ... | Madame Poignard (1 episode, 1966) |
| Lila Kedrova | ... | Emma Martens (1 episode, 1966) |
| Barbara Keogh | ... | Madame Jaminet (1 episode, 1966) |
| Alexander Knox | ... | Xavier Lhomond (1 episode, 1966) |
| Alan Lake | ... | Robert Eloi (1 episode, 1966) |
| Renny Lister | ... | Britt (1 episode, 1966) |
| Jonathan Lynn | ... | Moise (1 episode, 1966) |
| Kevin Manser | ... | Auctioneer (1 episode, 1966) |
| Mercia Mansfield | ... | Madame Sauvaget (1 episode, 1966) |
| Nan Marriott-Watson | ... | Madame Canut (1 episode, 1966) |
| Joan Miller | ... | Madame Malou (1 episode, 1966) |
| Mary Miller | ... | Alice (1 episode, 1966) |
| Bernadette Milnes | ... | Jacqueline (1 episode, 1966) |
| Zia Mohyeddin | ... | Elie Nagear (1 episode, 1966) |
| Priscilla Morgan | ... | Mlle. Germaine (1 episode, 1966) |
| Hazel Penwarden | ... | Nurse Blanche (1 episode, 1966) |
| Michael Robbins | ... | Desire (1 episode, 1966) |
| George Roderick | ... | Jules (1 episode, 1966) |
| Jon Rollason | ... | Emile (1 episode, 1966) |
| John Ronane | ... | Dieudonne Lambert (1 episode, 1966) |
| Jenny Russell | ... | Lili (1 episode, 1966) |
| Anthony Shirvell | ... | Gaston (1 episode, 1966) |
| Kevin Stoney | ... | Rinquet (1 episode, 1966) |
| Charles Thomas | ... | Paumelle (1 episode, 1966) |
| John Tillinger | ... | Edgar Malou (1 episode, 1966) |
| Andre Van Gyseghem | ... | Plantel (1 episode, 1966) |
| Simon Ward | ... | Alain Malou (1 episode, 1966) |
| Kenneth J. Warren | ... | Babin (1 episode, 1966) |
| Gwendolyn Watts | ... | Sylvie Baron (1 episode, 1966) |
| Jerold Wells | ... | Chief Supt. Gentil (1 episode, 1966) |
| Frank Williams | ... | Maître Abeille (1 episode, 1966) |
| Neil Wilson | ... | Tigny (1 episode, 1966) |
| Jack Woolgar | ... | Joseph Bourgues (1 episode, 1966) |
| Joan Young | ... | Jaja (1 episode, 1966) |
