![](https://image.tmdb.org/t/p/original/vYWOdpwjbKDvQvyRbU47EryKP25.jpg)
![](https://image.tmdb.org/t/p/w342/xBJvLe2gdoVmZvXWoTWYFGiFM4a.jpg)
The Poison Pen Letters
Hancock is upset by a steady stream of unpleasant letters. But when the police keep a watch on the post box where the letters are being posted, Sid discovers that Hancock has been writing the letters to himself... in his sleep!
![](https://image.tmdb.org/t/p/w300/vYWOdpwjbKDvQvyRbU47EryKP25.jpg)
Other episodes for this season
![The Cold](https://image.tmdb.org/t/p/w300/vYWOdpwjbKDvQvyRbU47EryKP25.jpg)
![The Missing Page](https://image.tmdb.org/t/p/w300/vYWOdpwjbKDvQvyRbU47EryKP25.jpg)
![The Emigrant](https://image.tmdb.org/t/p/w300/vYWOdpwjbKDvQvyRbU47EryKP25.jpg)
![The Reunion Party](https://image.tmdb.org/t/p/w300/y1yua5jd0QlXU7pUeYdPmtLPRnG.jpg)
![Sid in Love](https://image.tmdb.org/t/p/w300/vYWOdpwjbKDvQvyRbU47EryKP25.jpg)
![The Baby-Sitters](https://image.tmdb.org/t/p/w300/vYWOdpwjbKDvQvyRbU47EryKP25.jpg)
![The Ladies Man](https://image.tmdb.org/t/p/w300/vYWOdpwjbKDvQvyRbU47EryKP25.jpg)
![The Photographer](https://image.tmdb.org/t/p/w300/vYWOdpwjbKDvQvyRbU47EryKP25.jpg)
![The East Cheam Centenary](https://image.tmdb.org/t/p/w300/vYWOdpwjbKDvQvyRbU47EryKP25.jpg)
![The Poison Pen Letters](https://image.tmdb.org/t/p/w300/vYWOdpwjbKDvQvyRbU47EryKP25.jpg)