The new ITV thriller, Betrayal, features Shaun Evans as John, an MI5 agent facing scrutiny at work and difficulties in his personal life with his marriage.
In the new series, Evan is joined by Romola Garai, who plays John’s wife, Claire. Zahra Ahmadi joins the cast as Mehreen, an intelligence officer brought in to cover John’s work when he faces an internal investigation.
Despite knowing he should move on, John finds it difficult to leave his job. He strongly believes – even though no one else agrees – that a serious attack on the UK is about to happen, orchestrated by a radical group within the Iranian government.
But who else stars alongside Evans, Garai and Ahmadi and who do they all play?
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Read on for everything you need to know about the cast of Betrayal.
Betrayal cast: Who stars in the ITV thriller?
Below you’ll find information about the actors and characters in Betrayal, including details about the cast and where you might recognize them from.
- Shaun Evans as John Hughes
- Romola Garai as Claire Wardly
- Zahra Ahmadi as Mehreen Askari-Evans
- Nikki Amuka-Bird as Simone Grant
- Gamba Cole as Rudy Kember
- Omid Djalili as Qasem Asadi
- Matthew Tennyson as Greg Taylor
- Hayley Tamaddon as Fatemah Feyzi
- Anthony Flanagan as Craig Beeston
- Paddy Rowan as Wesley Ewen
- Waj Ali as Ehsan Taremi
- Karim Kadjar as Sardar Farahani
- Emma Cunniffe as Eve Hardy
- Georgina Rylance as Penelope Thomas
- Ben Lambert as Martin Leonard
- Julia Watson as Colette Wardly
- Julian Wadham as Graham Wardly
- Raphael Zari as Hossein Chalabi
- Elham Karimpour as Mona Taremi
- Aidan Rivers as Jordan Ainsworth
- Corin Silva as Karlson Griffiths
- Eliza Agrosoaie as Marta Vasilescu
Shaun Evans as John Hughes
John Hughes is an MI5 officer with several years of experience. He’s working in the intelligence sector at a time of significant change, and is also dealing with difficulties in his personal life.
You probably recognize Shaun Evans from his role as the young Inspector Morse in the TV series Endeavour. He’s also appeared in other popular shows like Teachers, Ashes to Ashes, Vigil, and Until I Kill You, and in films including Being Julia and Wreckers.
Romola Garai as Claire Wardly
Who is Claire Wardly? Claire is John’s wife, who is struggling in their marriage.
You might recognize Romola Garai from her work in a variety of TV shows and films. She’s appeared in series like Attachments, The Hour, Becoming Elizabeth, and Vigil, and in movies including Nicholas Nickleby, Atonement, One Day, and Suffragette, among others.
Zahra Ahmadi as Mehreen Askari-Evans
Mehreen Sakari-Evans is an intelligence officer brought in to temporarily handle John’s responsibilities while he’s being investigated internally.
You might recognize Zahra Ahmadi from her work on popular TV shows. She’s well-known for playing roles in EastEnders and Beyond Paradise, and has also been in shows like The Thick of It, Doctor Who, Black Mirror, Count Arthur Strong, Tracey Ullman’s Show, The Beast Must Die, The Bay, and Riches.
Nikki Amuka-Bird as Simone Grant
Who is Simone Grant? Simone is John’s boss at MI5.
You might recognize Nikki Amuka-Bird from her work in a variety of films and TV shows. She’s appeared in movies like Jupiter Ascending, Denial, and Knock at the Cabin, as well as series such as Torchwood, Silent Witness, Luther, Doctor Who, and Citadel. More recently, she’s been in shows like Death in Paradise and Here, and films including Old and Persuasion.
Gamba Cole as Rudy Kember
Who is Rudy Kember? Rudy is a friend of John’s and a member of his MI5 team, responsible for tech.
You might recognize Gamba Cole from his work on the TV series The Outlaws, but he’s also been in Lucky Man, Hanna, A Discovery of Witches, Death in Paradise, and Three Little Birds.
Omid Djalili as Qasem Asadi
Who is Qasem Asadi? Qasem Asadi is an Iranian General who becomes a part of John’s investigation.
You might recognize Omid Djalili from his work as a comedian and actor. He’s appeared in several popular films, including The Mummy, Gladiator, Pirates of the Caribbean: At World’s End, and Mamma Mia: Here We Go Again!. He’s also been in TV series like Small Potatoes, Whoopi, Lucky Man, and His Dark Materials.
Matthew Tennyson as Greg Taylor
Who is Greg Taylor? Greg is a member of John’s MI5 team who does not get along with him.
You might recognize Matthew Tennyson from shows like Midsomer Murders, The Hollow Crown, Father Brown, Humans, and Grantchester. He’s also appeared in the films Pride, Benediction, and Hamnet.
Betrayal will premiere at 9pm on Sunday 8th February on ITV1 and ITVX in 2026.
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Authors
James Hibbs writes about TV dramas for TopMob, covering shows on streaming services and traditional channels. Before becoming a writer, he worked in public relations, first at a business-to-business agency and then at Fremantle, a global TV production company. He holds a BA in English and Theatre Studies, as well as a Level 5 Diploma in Journalism.
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2026-02-08 11:12