Series cast summary: |
| Alan Badel | - | Charles I 1 episode, 1970 |
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| Keith Barron | - | Byron 1 episode, 1970 |
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| Bill Gavin | - | Alexander Fleming 1 episode, 1970 |
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| Anthony Hopkins | - | Danton 1 episode, 1970 |
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| Michael Jayston | - | Ludwig van Beethoven 1 episode, 1970 |
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| Richard Vernon | - | Tycho Brahe 1 episode, 1970 |
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| Julian Burbery | - | La Fornarina 1 episode, 1970 |
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| Tony Calvin | - | Kepler 1 episode, 1970 |
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| Rupert Davies | - | Sir Almroth Wright 1 episode, 1970 |
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| Alan Dobie | - | Robespierre 1 episode, 1970 |
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| Robin Ellis | - | Hammond 1 episode, 1970 |
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| Edward Hardwicke | - | Franz von Brunswick 1 episode, 1970 |
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| Peter Cellier | - | Ashburnham 1 episode, 1970 |
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| Gigi Gatti | - | Luigia 1 episode, 1970 |
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| Charles Leno | - | Haydn 1 episode, 1970 |
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| David Quilter | - | Nicholson 1 episode, 1970 |
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| Michael Robbins | - | Sanson 1 episode, 1970 |
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| Leslie Schofield | - | Willi 1 episode, 1970 |
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| Jack Connell | - | Hans 1 episode, 1970 |
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| Clifford Cox | - | Crony 1 episode, 1970 |
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| Michael Deacon | - | Firebrace 1 episode, 1970 |
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| Margaret Ford | - | Mary Shelley 1 episode, 1970 |
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| Nancie Jackson | - | Sareen Fleming 1 episode, 1970 |
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| John Loder | - | General Kugelgen 1 episode, 1970 |
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| Laurence Carter | - | Shelley 1 episode, 1970 |
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| Hugh Dickson | - | Troughton 1 episode, 1970 |
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| Tenniel Evans | - | Gen. Westermann 1 episode, 1970 |
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| Judy Parfitt | - | Josephine Deym 1 episode, 1970 |
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| Anne Pichon | - | Katherine 1 episode, 1970 |
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| Richard Warner | - | John Freeman 1 episode, 1970 |
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| Richard Caldicot | - | Kings's Chaplain 1 episode, 1970 |
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| Claire Davenport | - | Gretchen 1 episode, 1970 |
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| Robert Hartley | - | Secretary 1 episode, 1970 |
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| Michelle Martin | - | Allegra 1 episode, 1970 |
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| Terry Scully | - | Fabre d'Eglantine 1 episode, 1970 |
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| Charles Workman | - | 1st Doctor 1 episode, 1970 |
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| Georgine Anderson | - | Bettina von Breitkopf 1 episode, 1970 |
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| Larry Dann | - | Hedley 1 episode, 1970 |
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| Paul Dawkins | - | Denbigh 1 episode, 1970 |
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| Godfrey James | - | Heinrich 1 episode, 1970 |
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| Norman Mitchell | - | Tita 1 episode, 1970 |
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| John Quentin | - | Hérault de Seychelles 1 episode, 1970 |
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| Ian Cunningham | - | Wilks 1 episode, 1970 |
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| Windsor Davies | - | Fletcher 1 episode, 1970 |
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| Mary Holder | - | Mrs. Watson 1 episode, 1970 |
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| Mark Jones | - | Camille Desmoulins 1 episode, 1970 |
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| Roland Pickering | - | Friedrich von Breitkopf 1 episode, 1970 |
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| Michael Sheard | - | Spangenberg 1 episode, 1970 |
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| David Andrews | - | St. Just 1 episode, 1970 |
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| Charles Bolton | - | Student 1 episode, 1970 |
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| Ingrid Bower | - | Dr. Szelepscenyl 1 episode, 1970 |
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| Geoffrey Chater | - | Hoppner 1 episode, 1970 |
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| Neil Wilson | - | Anton von Breitkopf 1 episode, 1970 |
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| Kenneth Benda | - | Schneller 1 episode, 1970 |
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| Robert Cross | - | Guard 1 episode, 1970 |
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| Raf De La Torre | - | Count Guiccioli 1 episode, 1970 |
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| Murray Noble | - | Student 1 episode, 1970 |
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| Wyn Owen | - | Mrs. Freeman 1 episode, 1970 |
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| Alan Adams | - | Customs officer 1 episode, 1970 |
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| Anne Downes | - | Nicholson's girl friend 1 episode, 1970 |
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| Athene Fielding | - | Lucile 1 episode, 1970 |
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| Crispin Gillbard | - | Student 1 episode, 1970 |
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| Geoffrey Wincott | - | Count Rangoni 1 episode, 1970 |
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| Janina Faye | - | Teresa Guiccioli 1 episode, 1970 |
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| Wendy Johnson | - | Sister 1 episode, 1970 |
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| Sheila Ruskin | - | Christine Unger-Sabatier 1 episode, 1970 |
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| Norman Tyrrell | - | Maestlin 1 episode, 1970 |
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| Jerome Willis | - | Ducray 1 episode, 1970 |
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| Geoffrey Bayldon | - | Couthon 1 episode, 1970 |
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| Rowena Cooper | - | Maria Lichnowsky 1 episode, 1970 |
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| Gita Denise | - | Contessa Benzoni 1 episode, 1970 |
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| Ronald Nunnery | - | Miller 1 episode, 1970 |
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| Anne Berry | - | Augusta 1 episode, 1970 |
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| David Garth | - | Prince Lichnowsky 1 episode, 1970 |
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| Christopher Gray | - | Schoolboy 1 episode, 1970 |
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| John Malcolm | - | Sergeant 1 episode, 1970 |
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| Janet Burnell | - | Countess Werdenberg 1 episode, 1970 |
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| Michael Douglas | - | Schoolboy 1 episode, 1970 |
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| Malcolm Rogers | - | Private 1 episode, 1970 |
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| Anthony Ainley | - | Trelawny 1 episode, 1970 |
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| Jeanne Doree | - | Old woman 1 episode, 1970 |
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| Michael Hall | - | Wilhelm 1 episode, 1970 |
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| Keith Marsh | - | Hoffman 1 episode, 1970 |
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| Beatrice Greeke | - | Old woman 1 episode, 1970 |
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| Christine Ozanne | - | Barbara 1 episode, 1970 |
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| Michael Wennink | - | Pietro Gamba 1 episode, 1970 |
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| Sarah Frampton | - | Anna Deym 1 episode, 1970 |
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| John Keston | - | Dragoon 1 episode, 1970 |
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| Malya Nappi | - | Old woman 1 episode, 1970 |
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| John Savident | - | Muehleck 1 episode, 1970 |
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| Terence Conoley | - | Duke of Wallenstein 1 episode, 1970 |
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| Jean Heywood | - | Mme. Duplay 1 episode, 1970 |
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| Ray Marioni | - | Guard 1 episode, 1970 |
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| Derek Pollitt | - | 2nd Doctor 1 episode, 1970 |
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| Richard Vanstone | - | Countryman 1 episode, 1970 |
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| Victor Baring | - | Chief of Police 1 episode, 1970 |
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| John Caesar | - | Soldier 1 episode, 1970 |
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| Rufus Frampton | - | Kistner 1 episode, 1970 |
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| Paula Wilcox | - | Hilde 1 episode, 1970 |
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| Norman McGlen | - | Jepp 1 episode, 1970 |
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| Jay Neill | - | Health guard 1 episode, 1970 |
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| Antonio Di Maggio | - | Health guard 1 episode, 1970 |
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| Denys Peek | - | Georg 1 episode, 1970 |
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| Jean Channon | - | Lady Blessington 1 episode, 1970 |
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| Constantine Gregory | - | Tengnagel 1 episode, 1970 |
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| Paul Kalli | - | Loukas 1 episode, 1970 |
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| Mary Pemberton | - | Elizabeth 1 episode, 1970 |
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| Emrys Leyshon | - | Longomontanus 1 episode, 1970 |
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| Maurice Quick | - | Doctor 1 episode, 1970 |
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| David Nettheim | - | Barwitz 1 episode, 1970 |
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| Larry Beattie | - | Man in crowd 1 episode, 1970 |
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| Peter Fontaine | - | Provost 1 episode, 1970 |
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| Pamela Stirling | - | Susanna 1 episode, 1970 |
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| Will Leighton | - | Doctor 1 episode, 1970 |
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