When ITV announced the arrival of Betrayal, a four-part espionage drama starring Shaun Evans, many expected another high-octane, globe-trotting spy adventure. Instead, what viewers received was something far more intimate and, in many ways, more unsettling: a story about the cost of secrecy, the exhaustion of midlife, and the blurry line between professional duty and personal collapse. Released on February 8, 2026, and available on both ITV and ITVX, Betrayal has quickly become a talking point—not for its car chases or gadgetry, but for its raw, slow-burning look at the toll of a life spent in the shadows.
At the center of Betrayal is John Hughes, an MI5 officer portrayed by Shaun Evans, whose previous decade-long run as young Morse in Endeavour left audiences used to seeing him as a dogged but principled detective. Here, Evans is almost unrecognizable: John is a mid-career intelligence officer, not chasing justice but fending off irrelevance, his instincts doubted and his methods policed. As The Guardian notes, John is "a maverick with a complicated personal life, an irascible dinosaur pursuing his last quarry before the stiff shirts in head office finally manage to manoeuvre him into redundancy."
The opening episode sets the tone. John meets an informant at a motorway service station in Stockport, a far cry from the glamorous locales of typical spy fare. The informant, tied to an Iranian faction and the criminal underworld, hints at a looming terror threat but is shot dead before revealing anything substantial. John, acting on instinct and breaking protocol by going alone, kills the hitman in a desperate struggle. The aftermath is grim: two bodies under a grey sky and a shaken, bloodied John awaiting the consequences of his actions.
Back at MI5 headquarters, the fallout is swift. John's decision to act alone is not his first breach of the rules, and the agency is less than sympathetic. He's placed on leave, told to hand over the case, and strongly encouraged to take "voluntary" redundancy. As The Telegraph observes, "Hughes was breaking the rules – not for the first time – by going alone to meet this source, and the security services had to clean up the mess (nobody wants to see dead bodies outside a Welcome Break, do they?)." Yet, like any good maverick, John can't let go. The tip about the terror attack gnaws at him, and he continues investigating despite being officially sidelined.
Complicating matters further is the arrival of Mehreen Askari-Evans, played with steely composure by Zahra Ahmadi. Parachuted in from MI6, Mehreen is assigned to take over John's responsibilities, serving both as a professional rival and a mirror to the things John can no longer handle. Her presence is not just a plot device but a commentary on generational and cultural shifts within the intelligence community. According to The Telegraph, John also forms a "professional relationship – for now – with a new female colleague (played by Zahra Ahmadi)," hinting at the subtle tensions that run beneath the surface.
But Betrayal is as much about the domestic sphere as it is about national security. Romola Garai delivers a standout performance as Claire, John's wife, a general practitioner juggling her own demanding career, the care of their children, and the emotional fallout of her husband's secrecy. Their marriage is depicted with painful realism: Claire is not angry so much as exhausted, her fatigue evident in every whispered line and incomplete sentence. As The Guardian puts it, "Garai gets it perfectly: the main emotion she gives Claire isn’t anger but deep, bitter fatigue. That woman is TIRED."
This focus on the personal costs of espionage sets Betrayal apart. The series trades the glamour of international intrigue for the drabness of car parks, pubs, and B&Bs. The camera lingers on John’s worn-out face, often illuminated by harsh streetlights, capturing the sense of a man who can no longer distinguish between losing control of his life and losing control of a case. Every scene seems to ask: Who do you become when everything is private?
The supporting cast adds further texture. Nikki Amuka-Bird plays Simone Grant, John's boss at MI5, whose own journey through the agency is marked by institutional skepticism and reflections on diversity. In one memorable exchange, Grant recalls entering the service as part of a new, supposedly more inclusive cohort, only to find that "all that happened is the public schoolboys went, and in came the equally d--k-swinging working-class lads." This acknowledgment of the challenges faced by women and minorities in the intelligence world adds another layer to the show’s realism.
Other notable performances include Gamba Cole as Rudy, a tech-savvy friend who injects a bit of pulse into the plot, and Omid Djalili, who plays Qasem Asadi ("the General") with a serene intensity that avoids caricature. These characters don’t steal the spotlight but broaden the frame, showing that the world of espionage is populated by more than just lone wolves and shadowy antagonists.
The writing, courtesy of David Eldridge, is sharp and grounded. Dialogue crackles with authenticity, whether it's John muttering "What a d--k" after a frustrating phone call or the awkward exchanges in glass-walled conference rooms where suspicion is both silent and suffocating. As The Guardian notes, "The dialogue regularly resorts to gobs of exposition to fill gaps, and both the first two episodes get to their closing cliffhangers via the cheeky shortcut of suddenly revealing key information to us but not to John, whose eyes we are otherwise seeing through." Yet, the show’s restraint is also its strength. It avoids the temptation of constant plot fireworks, opting instead for thoughtful conversation and precise pacing.
Not all critics have been won over. Some have found the tone too subdued, even dull. "Betrayal is an espionage thriller so drab and downbeat, it plays more like a crime drama," writes The Guardian. But this criticism may miss the point. Betrayal is less about clarity and more about the price of living—and working—in perpetual uncertainty. Its spareness is not emptiness but a deliberate choice, one that leaves just enough unsaid to linger in the viewer’s mind long after the credits roll.
Viewer reactions have been swift and largely positive. Many have binge-watched the series on ITVX, calling it "impressive" and "the best drama ITV has produced in a long time." The show’s willingness to forgo spectacle in favor of psychological realism appears to have struck a chord, suggesting a growing appetite for more intelligent, grounded stories within the genre.
In the end, Betrayal offers a quietly devastating portrait of a man—and a marriage—under siege from the very secrecy meant to protect them. It’s a reminder that in the world of espionage, the greatest threats are often not the ones lurking in the shadows, but the ones festering within.