Romola Garai has joined the cast of ITV's new spy thriller 'Betrayal,' where she stars alongside Shaun Evans. In the series, Garai plays Claire, the wife of MI5 officer John Hughes. The story delves into the complexities of their relationship as John faces the challenges of his career while Claire navigates both her professional duties as a GP and the strains of her marriage due to his secretive lifestyle.

Garai's character, Claire, is depicted as hardworking and resilient, managing personal and professional pressures while dealing with the emotional turmoil that accompanies being married to a spy. The series highlights the dichotomy between the initially thrilling prospect of being involved with someone in intelligence and the less glamorous reality that unfolds as the story progresses. This reflects broader themes around the sacrifices and hidden struggles often faced by families of those in high-stakes professions.

Overall, 'Betrayal' promises to explore not just the espionage elements but also the intimate struggles in personal relationships affected by secrecy and duty. As an accomplished actress known for her roles in other historical dramas, Garai's participation adds depth to the narrative, encapsulating the emotional weight of living in a world defined by secrecy, ultimately shining a light on the personal costs of such a career choice.