TVTV NewsChannel 4The first series aired back in 2024 and features the likes of Simon Pegg and Adrian Lester.14:25, 29 Jun 2026There's good news for fans of a Channel 4 thriller.‌A second series of The Undeclared War is on the way as the broadcaster has released a first look at what fans can expect to see.‌The gripping show began four years ago and focuses on the run-up to a British general election in a post-pandemic 2024.‌It followed a leading team of analysts in GCHQ who are secretly working to ward off a series of cyber-attacks on the UK during the election.The six-part series was a huge hit with fans, as many described it as 'brilliant' and 'nail-biting'. Now, the team are back in action once again as the broadcaster shared a glimpse at the upcoming second series.‌Simon Pegg reprises his role as Danny Patrick, the director of operations at GCHQ, while Sian Brooke joins the cast as his wife Barbara, an analyst and ex-MI16 person.The trailer shows a screen being corrupted as someone asks what has happened before Danny comments: "This is a potentially nuclear piece of malware."As another voiceover explained, this is the cyber equivalent of an armed attack as tensions reach boiling point as Danny reveals they have a mole in GCHQ.‌People are then seen in the trailer looking extremely stressed and anxious as they try to get to the bottom of who is being attacked.Meanwhile, another man highlighted that 'serious allegations' were being made against a 'respected colleague'‌Sharing the trailer on Instagram, Channel 4 captioned the post: "New threats. Higher stakes. Cyber-thriller The Undeclared War returns. Coming soon to Channel 4 #TheUndeclaredWar."Speaking about the series, Ollie Madden, Director of Film4 and Channel 4 Drama told TVZoneUK: "As the world of cyber-warfare and espionage continue to evolve at pace around us, what better than to bring back The Undeclared War for another riveting, unpredictable, painstakingly researched series...Article continues below"Colin Teevan's scripts, Paul McGuigan's dynamic direction, and our incredible cast promise something unmissable."We're very excited to be collaborating again with our partners at Playground Entertainment, Universal International Studios, Stonehenge Films on this cutting-edge thriller."Series one of The Undeclared War is available to watch on Channel 4.Choose Daily Mirror as a 'Preferred Source' on Google News for quick access to the news you value.‌Channel 4Simon Pegg