In the crowded world of television espionage, where high-octane action and globe-trotting escapades often dominate, ITV’s new four-part series Betrayal has quietly carved out a space of its own. Premiering on February 8, 2026, and available on both ITV and ITVX, the series stars Shaun Evans as John Hughes—a mid-career MI5 officer whose life is unraveling as fast as the cases he’s meant to solve. But this isn’t your typical spy drama. Instead, Betrayal leans into the psychological and emotional costs of a life spent in the shadows, offering a story that’s as much about identity and intimacy as it is about national security.
Evans, best known for his decade-long turn as the young Morse in Endeavour, takes a sharp turn here. As John Hughes, he’s not chasing murderers or basking in the glow of professional triumph. Instead, he’s a man out of step with his own organization and, increasingly, with himself. According to The Guardian, "John Hughes (Shaun Evans) has been a spy for 20 years, but a life of enviable glamour still eludes him." The opening episode wastes no time in stripping away any notion of glamour: within minutes, Hughes is left bloodied in a motorway service station parking lot, flanked by two corpses—a murdered informant and the hitman Hughes kills in a desperate struggle.
The plot kicks off when Hughes meets an Iranian informant claiming knowledge of a planned terror attack. The informant, seeking safety for his family in exchange for information, is shot dead before he can reveal much. Hughes, acting on instinct, chases down and kills the assailant in self-defense. But the fallout is immediate and severe. Back at MI5 headquarters, Hughes is reprimanded for breaking protocol by meeting the source alone—an infraction that’s apparently not his first. He’s placed on leave, told to hand over the case, and is strongly encouraged to take “voluntary” redundancy. Yet, true to the maverick archetype, Hughes can’t let the tip about the terror threat go, continuing his investigation despite being sidelined.
What makes Betrayal stand out isn’t just its plot, but its attention to the quieter, more corrosive effects of a life lived undercover. The series, created by David Eldridge, is "subtle but full of meaning," as Private Therapy Clinics describes. Rather than relying on explosive set pieces or technological wizardry, the show offers a portrait of a man who can no longer distinguish between losing control of his life and losing control of a case. The tone is intimate, almost claustrophobic, with every scene posing the question: Who do you become when everything is private?
Evans’s performance is a revelation for those who know him as Morse. He brings "charm and chippiness" to Hughes, as The Telegraph notes, but also a kind of wounded ambiguity. He’s not just a rule-breaker; he’s a man whose instincts, once valued, are now questioned at every turn. His methods are policed, his authority eroded. The show’s creators made a deliberate choice in casting Evans, knowing that fans might expect closure and structure. Instead, they get moral slippage and doubt—a man who is, as the series suggests, "unable to distinguish between losing control of his life and a case."
The supporting cast adds layers of complexity. Zahra Ahmadi plays Mehreen Askari-Evans, an intelligence agent parachuted in from MI6 to take over Hughes’s responsibilities. Her introduction is both a professional and personal mirror for Hughes—she embodies the composure and authority he can no longer muster. Romola Garai shines as Claire, John’s wife and a middle-class GP juggling work, children, and a marriage that feels more like emotional triage than partnership. As The Guardian observes, "Garai gets it perfectly: the main emotion she gives Claire isn’t anger but deep, bitter fatigue. That woman is TIRED."
The show doesn’t shy away from the realities of domestic life, either. Claire’s exhaustion is palpable, her trust in John already eroded by a past affair at work and his ever-present secrecy. In a telling moment, she confides to a counselor, "Virtually everything he does in a normal working week looks like he’s up to something." The class divide between the couple, the imbalance in emotional labor, and the relentless demands of both their professions are brought to life with dialogue that feels authentic and lived-in.
Other notable performances include Nikki Amuka-Bird as Simone Grant, Hughes’s boss at MI5. Her character isn’t just a token of diversity; the show acknowledges her experience as a Black woman entering the service alongside working-class Hughes during a diversity drive. Grant reflects on the changes within MI5, remarking, "All that happened is the public schoolboys went, and in came the equally d--k-swinging working-class lads." Omid Djalili, playing "the General," brings a quiet intensity to the role, avoiding caricature and instead grounding the story in a more realistic portrayal of international intrigue.
Stylistically, Betrayal is as drab and downbeat as its protagonist. The action unfolds in mundane locations—car parks, flat-roofed pubs, musty B&Bs, and high streets littered with takeaway joints. Oblique camera angles and muted color palettes accentuate the malaise. The series is "noted for its downbeat tone, focusing on the psychological and emotional toll of espionage rather than action," as The Guardian puts it. Even the dialogue, laced with dry humor and frustration, feels grounded in reality. Hughes’s sarcastic comment about MI5’s patchy mental health provision, or his quip about the lack of almond milk, land with the kind of weary resignation that comes from years of institutional disappointment.
Despite its sparse narrative, the series maintains a remarkable level of suspense. It’s not the kind that explodes off the screen, but the kind that lingers, gnawing at the edges. The decision to keep the show to four episodes was, by most accounts, a wise one. "Because it doesn’t squander anything, develops momentum, and leaves just enough unsaid to stick with you after the credits have rolled," writes Private Therapy Clinics. Viewers have responded quickly and favorably, with many binge-watching the entire season and calling it "the best drama ITV has produced in a long time."
Of course, not every critic is convinced. Some have found the tone "overly subdued, even dull." But perhaps that criticism misses the point. Betrayal isn’t about clarity or catharsis; it’s about the cost of spending too much time in uncertainty. It’s about the hidden toll of secrecy—not just on national security, but on the self.
In the end, Betrayal stands as a quietly powerful meditation on the price of loyalty and the ways in which secrecy can erode not just trust, but identity itself. It’s a spy thriller that finds its greatest suspense not in what’s revealed, but in what remains unsaid.