Grant had placed listening devices throughout the village, and the story is told through snippets of the recordings he made, Kelly's police interviews and the detectives' conversations about their investigation.
The cast featured John Carlisle, Lesley Sharp, Philip Glenister, Sarah Smart, Daniel Ryan, Sean Gallagher, Nicola Walker, and Will Keen.
[6] The story's plot centres upon a police agent, Mark, who is left without any memories of his past but fears that he may actually be a brainwashed terrorist.
[7] As the story progresses he discovers that neither personality is genuine and that he's an undercover agent who habitually has his mind wiped and reprogrammed to assist the government in solving cases.
The cast featured Nicola Walker, Rupert Graves, Steven Mackintosh, Jana Carpenter, Anthony Calf, Imogen McCurdy, Oscar Richardson, Rohan Nijhawan, and Ted Powell.
[10] The story starts with attempts to extract the memories of a government agent who had gone to Pleasant Green to investigate a new numbers station, only to end up in a fugue state.
[12][13] The cast featured Nicola Walker, Steven Mackintosh, Tim McInnerny, Ferdinand Kingsley, Phoebe Fox, and Ben Crowe.
The first episode features her looking for a spell book in a remote village, while the second has her exploring a secret door in a Scottish castle and taking on a new partner.
The first series, based on the story "The Case of Charles Dexter Ward", began airing in January 2019 on BBC Radio 4 and ran for ten episodes.