In 1967 a group of writers in the US pulled off an ingenious hoax – the publication of a so-called top secret document detailing how global peace would destroy American society. Even when the deception was revealed, many groups on the left and right argued it was true, or that it revealed truths about the ‘deep state’. Phil Tinline takes up the story in Ghosts of Iron Mountain, showing how what started as satire gained currency, as trust in government and institutions collapsed.

During the Covid-19 lockdown the comedian Rosie Holt began a series of satirical videos in which she spliced together actual footage from news interviews with her play-acting the role of a politician. Many of her parodies caused outrage as viewers thought she was a real MP.

The statistician and epidemiologist Professor Adam Kucharski is interested in how people establish fact from fiction. In Proof: The Uncertain Science Of Certainty he explores how truth emerges, but warns against building a society that distrusts and doubts everything.

Producer: Katy Hickman