Enter Saara, whose first day on the job coincides with the attack. Blunt, intense, and desperate to prove to both herself and others that she’s not a positive discrimination hire (“I hope that’s not why you picked me – because I’ve got a brown face”), she is quicker and more thorough than most of the self-styled “male, pale and stale” GCHQ cohort who show her the ropes when she first arrives – although she struggles to read people as well as she understands numbers.

Newcomer Hannah Khalique-Brown leads the cast in her scene-stealing (and surely star-making) breakout role as Saara, the audience’s stand-in as she’s introduced to the GCHQ Malware Department.

The dream-like sequences demonstrating Saara’s programming gymnastics are a brilliant choice – they elevate the series far beyond the normal representations of cybersecurity onscreen, which usually involve a group of people clustered around a desktop and yelling at flashing green numbers on a screen.

For those viewers with little knowledge of code or hacking, the metaphorical sequences not only demonstrate just how complex and difficult the task at hand is, but they also help demonstrate both Saara’s skill and the high stakes she faces.

Alongside Khalique-Brown, the cast includes Simon Pegg as Danny Patrick, GCHQ’s head of operations, and Adrian Lester as Britain’s first Black Conservative prime minister who, we’re told, ousted Boris Johnson in a particularly brutal fashion.