During the War, a British agent travels to the remote Glennye Castle in the wilds of Scotland to investigate a mysterious murder by a masked phantom. Who or what is the phantom? And how are the Germans involved?
| Actor | Role |
|---|---|
| MMara Russell-TavernanGabrielle, Marchioness of Glenye | Gabrielle, Marchioness of Glenye |
| RRobert EssexNigel Glenye | Nigel Glenye |
| KKarl MeirMaj. Martin Selwyn | Maj. Martin Selwyn |
| JJames LiggatCapt. Neale (as James Liggatt) | Capt. Neale (as James Liggatt) |
| JJohn GauntleyMichael Glenye | Michael Glenye |
 Alastair HunterMcTavish | McTavish |
| MMaureen O'MoorMaggie | Maggie |