![](https://image.tmdb.org/t/p/w342/tadYCjgEuwV8S580r06qUFv3CB2.jpg)
Mr Palfrey investigates the murder of a fellow spy and finds that the roots of his death were in a battle fought centuries ago.
![](https://image.tmdb.org/t/p/w300/ea7ebICP4gFl8vWygBkwSasbZYy.jpg)
![](https://image.tmdb.org/t/p/w300/4AKsKXMGfVuORikLKIpnG6mtN7f.jpg)
Other episodes for this season
![Freedom From Longing](https://image.tmdb.org/t/p/w300/ea7ebICP4gFl8vWygBkwSasbZYy.jpg)
![Return to Sender](https://image.tmdb.org/t/p/w300/ea7ebICP4gFl8vWygBkwSasbZYy.jpg)
![Music of a Dead Prophet](https://image.tmdb.org/t/p/w300/ea7ebICP4gFl8vWygBkwSasbZYy.jpg)
![Official Secret](https://image.tmdb.org/t/p/w300/ea7ebICP4gFl8vWygBkwSasbZYy.jpg)
![Spy Game](https://image.tmdb.org/t/p/w300/ea7ebICP4gFl8vWygBkwSasbZYy.jpg)
![The Baited Trap](https://image.tmdb.org/t/p/w300/ea7ebICP4gFl8vWygBkwSasbZYy.jpg)
Mr Palfrey investigates the murder of a fellow spy and finds that the roots of his death were in a battle fought centuries ago.