Move over, 007. The world of television espionage is richer than ever, with hits like Apple TV+'s Slow Horses and Netflix's The Night Agent proving audiences crave more than just martinis and car chases. Now, a compact new British import is making waves for its intense, personal take on the genre. ITV's Betrayal, a four-episode drama that premiered in February 2026, is the perfect binge for fans waiting for the next season of their favorite spy misfits.
A Spy on the Edge
Created by David Eldridge, Betrayal centers on MI5 officer John Hughes, played with captivating vulnerability by Shaun Evans. The story ignites when John's informant—a British-Iranian man with dangerous connections—is executed after tipping him off about a potential threat to national security. Forced to kill the assassin in self-defense, John is left with a corpse, no leads, and a mountain of trouble.
His punishment is swift: a formal reprimand, a looming internal investigation, and a new partner, Simone Grant (Nikki Amuka-Bird), assigned to watch his every move. But John can't let the case go. Driven by a mix of duty and guilt, he continues his rogue investigation, digging deeper into a conspiracy that threatens to consume him.
The Cost of Secrets
Where Betrayal truly distinguishes itself is in its unflinching look at the personal toll of a spy's life. The series masterfully alternates between John's high-stakes professional world and the crumbling domestic one he shares with his wife, Claire (Romola Garai). His necessary absences and enforced secrecy strain their marriage to the breaking point, offering a raw, emotional counterpoint to the shadowy intrigue of his work.
This isn't a globe-trotting adventure filled with gadgetry. It's a grounded, gritty thriller where the biggest battles are often fought in quiet living rooms and tense office meetings. The series asks what happens when the job that demands everything begins to destroy the life you're supposedly protecting.
Why Slow Horses Fans Should Tune In
While it lacks the darkly comic ensemble of Slow Horses, Betrayal shares its DNA of disgrace and dogged determination. If Slough House is where failed spies are sent to rot, John Hughes is an agent actively being pushed toward that fate, fighting desperately to prove his worth and uncover the truth. The series takes a more focused, less humorous approach, honing in on one man's psychological and emotional unraveling as the walls close in.
The critical response has been strongly positive, with the series holding an 86% rating on Rotten Tomatoes. Reviewers have singled out Evans' "bewildered vulnerability" as the show's anchor, praising how he portrays a man struggling to be better against impossible odds. The writing has been commended for its "homespun" authenticity and clever twists, proving a spy thriller doesn't need blockbuster budgets to deliver serious tension. For fans of character-driven grit like Jodie Foster's 'The Brave One', this is essential viewing.
The Perfect Binge
With Slow Horses Season 6 not arriving until fall 2026, Betrayal arrives as a perfectly timed, laser-focused fix. Its four-episode runtime makes for an intense and utterly bingeable weekend watch. It's a reminder that the best thrillers often thrive on emotional depth and moral complexity, not just action set pieces.
In a landscape crowded with espionage tales, Betrayal carves out its own space by keeping the stakes profoundly human. It's a compelling portrait of a man caught between duty and disaster, both professionally and personally. For a quick, potent dose of spy drama with real heart, this ITV series is a clear winner. If you're looking for your next obsession after finishing the most unstoppable episodes of 'Breaking Bad', look no further.
