| | | 1981 |
| Juliet | Armstrong | Protagonist. |
| Dmitri | Shostakovich | Composed Leningard. |
| Matteo | Armstrong | Juliet Armstrong's son. |
| | | 1950 |
| Mr. Bernard | Prendergast | Juliet Armstrong's boss. |
| Joan | Timpson | Juliet Armstrong's co-worker. |
| Charles | Lofthouse | A man at the BBC meeting. |
| John | Reith | A broadcaster. |
| Lester | Pelling | A Junior Programme Engineer. |
| Beasley | | A man who wroks in BBC's midland region. |
| Daisy | Gibbs | New Junior Programme Assistant. |
| Bruce | Belfrage | The Newsreader. |
| Fraulen | Rosenfeld | A German advisor at BBC. |
| Mr. Godfrey | Toby | An MI5 Officer. aka: John Hazeldine, Toby Jug. |
| Mr. | Moretti | Restaurant owner. |
| Cyril | Forbes | Former workmate of Juliet Armstrong. |
| | | 1940
One of Us |
| Peregrine | Gibbons | Case Officer in MI5. aka: Perry, Mr. Nature. |
| Mosley | | A British Union Fascist Member. |
| Ludwig Van | Beethoven | A Composer. |
| Mr. Miles | Merton | Works for the government / Juliet Armstrong's boss. |
| Miss | Dicker | An interviewer. |
| Miss | Gillies | An art teacher. |
| Clarissa | Marchmont | Juliet Armstrong's friend. |
| Pamela | | Clarissa's sister. |
| Reginald | Applethwaite | A GPO research station at Dollis Hill. |
| Rupert | Hartley | Colleague of Clarissa in MI5. |
| | | Here's Dolly |
| Betty | Grieve | An Old comrades from British Union of Fascist. |
| Trude | Hedstrom | The Originator of Godfrey Toby's Operation. |
| Dolly | Roberts | An Old comrades from British Union of Fascist. |
| Edith | | A woman who works on a dress shop. |
| Walter | | Naturalized German who worked at Great Western Railway. |
| Victor | | A Machinist in an Aircraft Factory. |
| Mr. | Grieve | Betty Grieve's husband. |
| Dib | | Dolly Robert's dog. |
| Oliver | Alleyne | Peregrine Gibbon's boss. |
| Halifax | | A secretary for State of Foreign Affairs. |
| Hodges | | A naval engineer that Betty Grieve met. |
| Mrs. | Popper | Walter's mother-in-law. |
| | | Looking at Otters |
| Stella | Chalmers | A woman who gave Juliet Armstrong a transcription. |
| | | Have you met a Spy |
| Iris | Carter-Jenkins | Someone Juliet worked with |
| Ian | | Alias of MI5 Spy who playa role of Juliet Armstrong's fiance. |
| Rosamund | Scaife | Juliet Armstong's mission is to be close with this woman. |
| Anna | Wolkoff | Tsar Naval's daughter. |
| Dennis | | Another MI5 Spy. |
| Marjorie | | Mrs. Scaife's niece. |
| Florence | Ambrose | Perigrine Gibbons's Spy Agent. aka: Florence Eckersley. |
| Ellory | Scaife | Mrs. Rosamund Scaife's Husband / The Rear Admiral. |
| Beatrice | Dodds | Mrs. Rosamund Scaife's servant. |
| Minerva | Scaife | Rosamund and Ellory Scaife's daughter. aka: Minnie. |
| Ivo | Scaife | Rosamund and Ellory Scaife's son. |
| Wiggins | | Mrs. Rosamund Scaife's Ancient Factotum. |
| | | Dead Letter Drop |
| Wallis | | The Queen of Windsor. |
| Lew | Stone | A Band Singer. |
| William | Joyce | The Fifth Column Hero. |
| Lily | | Nelly Varga's dog. |
| | | War Work |
| Giselle | | Juliet Armstrong's co-worker and friend. |
| Miss | Bouchier | An MI5 Agent. |
| | | Masquerade |
| Mr. | Hyde | A Dualist. |
| Adolf | Hitler | Leader of Nazi Party. |
| Nightingale | | Mrs. Rosamund Scaife's new maid. |
| | | The Deception Game |
| Mrs. | Taylor | Edith's friend. |
| | | Die To Live |
| Ivy | Wilson | Alias of Juliet Armstrong. |
| Madge | Wilson | Alias of one of the MI5 Agents. |
| | | The Die is Cast |
| Chester | Vanderkamp | Man who works at American Embassy in Cypher Department. |
| Mata | Hari | Perigrine Gibbon's Colleague. |
| Franklin | Roosevelt | The U.S. President. |
| Mrs. | Shute | Trude's friend. |
| | | 1950 |
| Jessica | Hastie | A woman who played the role of the Miller's wife. |
| | | Past Lives - A series about the way people lived in the past. |
| Morna | Treadwell | A Scriptwriter / A friend of the Deputy Director General. |
| Roger | Fairbrother | A member of the cast in Past Lives / Miller's first serf. |
| Lord | Goddard | The Lord Chief Justice. |
| Mr. Pavel | Smith | A RAF Squadron Leader / Juliet Armstrong's visitor. |
| Ralph | Gorman | A member of British Actor's Equity Association. |
| Anthony | Quayle | An Actor in Stratford. |
| Diana | Wynyard | An Actress in Stratford. |
| Phillipa | Horrocks | A woman who lives in Old Godfrey Toby's house. |
| Timmy | Horrocks | Phillipa Horrocks's son. |
| Christopher | Horrocks | Phillipa Horrock's son. |
| Valerie | Horrocks | Phillipa Horrock's daughter. |
| Norman | Horrocks | Phillipa Horrock's husband. |
| Ellen | Eckersley | Mrs. Florecene Ambrose's niece |
| Stanley | Nattress | Betty Grieve's husband. |
| Henry | Tudor | King of England. aka: Henry The VII. |
| Henry | The VIII | Henry Tudor's son. |
| Katherine | Of Aragon | Henry The VIII's former wife. |
| Nelly | Varga | Lily's Owner. |
| | | 1940 |
| Harry | | French Detective that Juliet Armstrong has an affair with. |
| | | 1950 |
| Mr. | Fisher | A man who convinced Juliet Armstrong to work for him. |