بجد وصول العميل الأمريكي جيري ليعمل في المكتب البريطاني للاستخبارات، تشعر المديرة كريستين بالخوف من التجديد.

يجبر جميع الموظفين على إعادة اختباراتهم، بعد ان عمل جوزيف على إلغاء كل الملفات من دون قصد.

يجبر الفريق بأكمله على العمل ليلاً بعد أن تم خرق النظام السري للمكتب.

يقترح جيري انضمام الشخص الذي اخترق نظام المكتب إلى الفريق.

يعترف جيري أنه أقام علاقة مع توفا، وجوزيف يشعر بالإحباط.

جيري يطلق النار على أحد عملاء الإف بي آي، بعد أن عرف أنه يقيم علاقة مع زوجته.

The team are tasked with saving a nuclear power plant which is under cyber attack.

Jerry is hailed as the hero as disaster is averted at the nuclear power plant but threats still loom large. Meanwhile, the CySec mole is exposed.

It's a harassment and discrimination training day at CySec but all is not what is seems with the course leader, Hilary Bowen. Has Jerry met his match?

A rival GCHQ team find important information about the cyber weapon Eternal Blue. But when they refuse to share it, Jerry must think of a solution.

Jerry learns that a kidnapping group want him in an exchange for a hostage. Not keen on the idea, he comes up with a plan of his own.

After saving the day—and his own skin—Jerry is facing a bright future. Will he stay at GCHQ or go back to the US?

They’ve countered the Russians, they’ve foiled a plot to disrupt the NHS and they’ve prevented a nuclear disaster... But in this one-off special, the latest threat to our gang at the Government Communications Headquarters is personal. With the future of CySec at stake, the team have to go rogue to save their reputations and their jobs.