1. Episode 1

The sleepy fishing village of Glenkeel in Ireland's County Donegal is about to have its population reduced by one. Sergeant McGing will be delighted. He's dreamed of a good murder for years. But someone's ahead of him. They already know who's done it. And the murderer knows they know when he opens a letter signed 'The Bogmailer'.

3. Episode 3

More bits of the missing barman have been turning up in the picturesque Irish fishing village of Glenkeel. Meanwhile the Bogmailer's letters to Roarty are becoming increasingly outrageous in style and content, while Potter's affair with the Canon's housekeeper may yet prove to be life threatening.