After Foyle is a guest at a friend's home at a dinner for an important American diplomat, a suicide victim and German agent both are discovered near the house.
| Name | Type | Role | |
|---|---|---|---|
| Anthony Horowitz | Writer | ||
| Giles Foster | Director | ||
| Rebecca Johnson | Actor | Jenny Wentworth | |
| Kathryn Pogson | Actor | Valery Hunter | |
| Jon Rake | Actor | Warden | |
| Richard Durden | Actor | Letwin | |
| Geoffrey Freshwater | Actor | Sergeant Rivers | |
| Anthony Howell | Actor | Paul Milner | |
| Steven O'Donnell | Actor | Henry Jamieson | |
| Henry Goodman | Actor | Howard Paige | |
| Bryan Dick | Actor | Kenneth Hunter | |
| Mali Harries | Actor | Jane Milner | |
| Jack Chissick | Actor | Jack Dunning | |
| Sam Redford | Actor | Tom Fairweather | |
| Marlene Sidaway | Actor | Mrs Harrison | |
| Guy Henry | Actor | John Bishop | |
| Michael Kitchen | Actor | Christopher Foyle | |
| Geoffrey Chater | Actor | Professor Phillips | |
| Tim Treloar | Actor | Bob Fraser | |
| Clive Merrison | Actor | Dr Redmund | |
| Janine Duvitski | Actor | Eve Redmund | |
| John Rowe | Actor | Commander Simmons | |
| Nicholas Le Prevost | Actor | Arthur Lewes | |
| Honeysuckle Weeks | Actor | Sam Stewart | |
| Tom Georgeson | Actor | Richard Hunter | |
| Paul Foster | Actor | Colin Morton | |
| Jonathan Coy | Actor | Hans Maier | |
| Amanda Root | Actor | Elizabeth Lewes |