Foyle battles to save a young man accused of high treason from the executioner's noose in a case that will shatter his personal world to the core.
| Name | Type | Role | |
|---|---|---|---|
| Anthony Howell | Actor | DI Paul Milner | |
| Tim Van Eyken | Actor | Singer | |
| Denyse Alexander | Actor | Miss Longbridge | |
| Steven Pacey | Actor | Michael Harrison | |
| Rupert Frazer | Actor | Commander Howard | |
| Paul Webster | Actor | Henry Blakesway | |
| Joseph Kloska | Actor | DC Perkins | |
| Michael Kitchen | Actor | Christopher Foyle | |
| Dominic Jephcott | Actor | Edward Brenner | |
| Robert Ashcroft | Actor | Prison Warder | |
| Kirsty Besterman | Actor | Caroline Devereaux | |
| Leon Lissek | Actor | Isaac Rothstein | |
| David Yelland | Actor | Sir Charles Devereaux | |
| Honeysuckle Weeks | Actor | Sam Stewart | |
| Maggie Service | Actor | Sylvie Johnstone | |
| Will Keen | Actor | Alan Deakin | |
| Andrew Scott | Actor | James Devereaux | |
| Rik Makarem | Actor | Simon Rothstein | |
| Anastasia Hille | Actor | Jane Devereaux | |
| Max Brown | Actor | Adam Wainwright | |
| Hugh Ross | Actor | Richard Carstairs KC | |
| Georgie Glen | Actor | Mrs Ramsay | |
| Richard Goulding | Actor | Jack Stanford | |
| Ian Bartholomew | Actor | Dillon | |
| Finn Bennett | Actor | Young James Devereaux | |
| Richard Braine | Actor | Mr Harmworth | |
| David Baron | Actor | Old Bailey Judge |