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What is The Undeclared War about? 
In 2024, a team of analysts at the heart of Britain's intelligence agency, GCHQ, must race against time to prevent a foreign cyber attack on the country's electoral system during a critical general election. As tensions rise and the threat of war with Russia looms, they must use all their skills and resources to protect the integrity of the vote and prevent a catastrophic outcome. The fate of the nation rests in their hands.
Where can I stream The Undeclared War? 
You can stream The Undeclared War on: Peacock
What shows are similar to The Undeclared War? 
Some TV shows that have similar genres and were produced around the same time as The Undeclared War include Severance, Murderbot, The Last of Us, From, The Handmaid's Tale, Andor.