ITV Premieres MI5 Thriller Betrayal

ITV has premiered its latest espionage thriller, Betrayal, a four-part series that explores the high-stakes world of MI5 operations and personal turmoil. The drama stars Shaun Evans as veteran agent John Hughes and airs Sunday at 9 p.m. on ITV1, with all episodes available for streaming on ITVX from the debut night.

The story centers on John Hughes, a mid-career MI5 officer grappling with a crumbling marriage and professional pressures in an evolving intelligence landscape. On a tip from his instincts, John arranges to meet a British-Iranian informant linked to a Stockport gangland network, who claims knowledge of an imminent terrorist plot targeting the UK. The meeting unravels disastrously when the informant is murdered moments before John arrives. In self-defense, John fatally shoots the assassin, an act that propels him into a grueling internal investigation by MI5's oversight team.

As superiors question his methods and judgment, John faces voluntary redundancy and begins to doubt his career choice. His handler, Simone, played by Nikki Amuka-Bird, acknowledges his intuition but urges caution in resource use. "We all know your gut is good," she tells him, "but we have to...