Betrayal cast: Shaun Evans and Romola Garai star in ITV thriller
Zahra Ahmadi also stars in the spy series.
New ITV spy thriller series Betrayal stars Shaun Evans as John, an MI5 agent who finds himself under investigation at work, while also struggling to keep his marriage together at home.
Evans is joined in the new series by Romola Garai as John's wife Claire, while Zahra Ahmadi plays Mehreen, an intelligence operative recruited to take over John's duties while he is under internal investigation.
However, John struggles to let go of his job, as he becomes convinced, contrary to the beliefs of everyone else in the organisation, that an attack on the UK is imminent, led by a hardline faction of the Iranian regime.
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?
Here are the main cast members and characters in Betrayal. Read on below for more details about who they all are and where you've seen the actors before.
- 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
Who is John Hughes? John is a mid-career MI5 officer who is navigating a rapidly evolving intelligence landscape while struggling to keep his personal life intact.
Where have I seen Shaun Evans? Evans is best-known for playing a young Inspector Morse in Endeavour, but he has also had roles in series including Teachers, Ashes to Ashes, Vigil and Until I Kill You, as well as films such as Being Julia and Wreckers.
Romola Garai as Claire Wardly
Who is Claire Wardly? Claire is John's wife, who is struggling in their marriage.
Where have I seen Romola Garai? Garai has had roles in series including Attachments, The Hour, Tracks, The Miniaturist, Becoming Elizabeth, The Following Events Are Based on a Pack of Lies, Vigil and Just Act Normal, as well as films such as Nicholas Nickleby, Vanity Fair, As You Like It, Atonement, One Day, Suffragette, The Critic, One Life and Scoop.
Zahra Ahmadi as Mehreen Askari-Evans
Who is Mehreen Sakari-Evans? Mehreen is an intelligence operative who is tasked with taking over John’s duties while he is under internal investigation.
Where have I seen Zahra Ahmadi? Ahmadi is best-known for her roles in EastEnders and Beyond Paradise, while she has also appeared in 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.
Where have I seen Nikki Amuka-Bird? Amuka-Bird has had roles in films including Jupiter Ascending, Denial, A Private War, The Personal History of David Copperfield, Old, Persuasion, Knock at the Cabin and Here, as well as series including Torchwood, Silent Witness, Luther, Death in Paradise, Inside No 9, Doctor Who, Hard Sun, Avenue 5, Citadel and I, Jack Wright.
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.
Where have I seen Gamba Cole? Cole is best-known for his role in Stephen Merchant's series The Outlaws, while he has also appeared 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.
Where have I seen Omid Djalili? Djalili is a comedian and actor who has had roles in films including The Mummy, The World is Not Enough, Gladiator, Casanova, Pirates of the Caribbean: At World's End, Sex and the City 2, Mamma Mia: Here We Go Again!, Deep Cover and The Bad Guys 2, as well as series such as Small Potatoes, Whoopi, Dickensian, Lucky Man, His Dark Materials and The Change.
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.
Where have I seen Matthew Tennyson? Tennyson has had roles in series including Midsomer Murders, The Hollow Crown, Father Brown, Humans and Grantchester, as well as films such as 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 is a Drama Writer for Radio Times, covering programmes across both streaming platforms and linear channels. He previously worked in PR, first for a B2B agency and subsequently for international TV production company Fremantle. He possesses a BA in English and Theatre Studies and an NCTJ Level 5 Diploma in Journalism.
