Foyle investigates a man found with a knife in his stomach in a bombed out building while son Andrew gets involved in a top secret radar program.
| Name | Type | Role | |
|---|---|---|---|
| Anthony Horowitz | Writer | ||
| Jeremy Silberston | Director | ||
| Hugh Lloyd | Actor | Frank Watson | |
| Bill Thomas | Actor | Willis | |
| Geoffrey Hutchings | Actor | Harold Smith | |
| Julian Ovenden | Actor | Andrew Foyle | |
| Ifan Huw Dafydd | Actor | Creavey | |
| Anthony Calf | Actor | Martin Keller | |
| Katy Brittain | Actor | Joyce Davies | |
| Eileen Davies | Actor | Enid Smith | |
| Michael Kitchen | Actor | Christopher Foyle | |
| Michael Simkins | Actor | Hugh Reid | |
| Roger Allam | Actor | Alastair Graeme | |
| Fergus Webster | Actor | PC Fisher | |
| Adam Kotz | Actor | Henderson | |
| Honeysuckle Weeks | Actor | Sam Stewart | |
| Jane Booker | Actor | Elizabeth Graeme | |
| Louise Breckon-Richards | Actor | Jane Holdsworth | |
| Tom Bowles | Actor | Graham Davies | |
| Anton Lesser | Actor | Austin Carmichael | |
| Anthony Howell | Actor | Paul Milner | |
| Naomi Frederick | Actor | Anne Roberts | |
| Jamie Parker | Actor | Bruce Leighton-Morris | |
| Stephen Moore | Actor | Iain Stewert |