A film which has been described as 'one of most depressing and scary films' ever needed to have a disclaimer shown prior to airing on TV.
Now if I were to ask you to name the most 'depressing and scary' film ever, it's likely the response would be a gruesome slasher film or a psychological horror. But what if I told you real life could be a lot more horrifying than blockbuster gore?
In fact one film set in the 1980s Sheffield had a disclaimer playing before which warned viewers that 'scenes which follow may distress you'.
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You can watch the trailer below:
Originally airing on BBC2 in 1984, TV film Threads imagines a hypothetical scenario in which a nuclear bomb is dropped near a NATO base in Sheffield after all-out war erupts between the Soviet Union and the USA.
The film then follows what life after a nuclear attack would look like for the average person, including food shortages, healthcare being overwhelmed, leading to an eventual breakdown of law and order.
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The film ends on an equally grim note, with the British population dropping to levels not seen since the medieval ages and survivors existing by subsistence farming.
Considering the over-saturation of the apocalypse drama genre in the past couple of decades, Threads may not sound particularly horrifying nowadays.
But to people living during the Cold War, the spectre of a nuclear winter was a very real thing.
The BBC were concerned enough about public hysteria that they ended up airing a disclaimer before playing the film for the first time.
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Introduced by former BBC Newsnight presenter John Tusa, the journalist explained how the long-term effects of a 'nuclear winter' was an idea which was only finding its way into public consciousness, adding that such event would 'threaten the survival of the survivors' due to 'sub-zero temperatures' and nuclear fallout.
Going on to introduce Threads as a 'fictional' drama, Tusa added: "How would ordinary people survive the impact of the blast and the conditions that scientists say would result from a nuclear exchange?
"Threads is a drama - the characters and the events are fictional, and it deals with something that has never happened."
He continued: "But it draws on a vast amount of scientific information amassed over the last 40 years, on the likely effect and destructive power of nuclear war.
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"Some of the scenes which follow may distress you."
Despite the heavy subject matter, Threads has a strong critic reaction, going on to winning several BAFTA awards in 1985.
Threads will air on BBC Four at 10.20pm.
Brenna Cooper