Cyber thriller from BAFTA-winning creator Peter Kosminsky that lifts the veil on the most urgent battle of our time. Set in 2024, The Undeclared War tracks a leading team of analysts buried in the heart of GCHQ, secretly working to ward off a series of cyber-attacks on the UK in the run-up to a general election. When a routine stress test of internet infrastructure goes awry, 21-year-old GCHQ intern Saara Parvin (Hannah Khalique-Brown) suddenly finds herself operating on the invisible frontier of high-stakes cyber warfare. In a thrilling cat-and-mouse game, Saara and the team at GCHQ must try to stay one step ahead and anticipate their opponents’ every hidden move. The clock is ticking as a battle with high stakes and unpredictable enemies takes place entirely online, with very real consequences. But how do you win a war that most of the public don’t know you’re fighting? Also starring Simon Pegg, Maisie Richardson-Sellers, Adrian Lester, Alex Jennings, Mark Rylance and Kerry Godliman. In the second episode, Saara is put to work combing through the text in the virus, looking for passwords. It’s a monotonous job, likely to take days, but after many hours scrolling through, Saara finds a suspicious line of encrypted text within the code. Her colleagues think it’s unimportant, but Saara isn’t convinced. She also gets more familiar with the players at GCHQ and makes some unlikely friends. With their help, Saara unravels a dubious invitation to rendezvous – but is she closer to the truth or just willingly entering a carefully baited trap?