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Secret Service is a British espionage television series commissioned by ITVX and premiered on 27 April 2026 on ITV1 and ITVX. It is an adaptation of the novel of the same name by Tom Bradby.
Contents
Premise
The head of the Russia Desk at the British Secret Intelligence Service learns a senior British politician could be a potential Russian asset.
Cast
Gemma Arterton as Kate Henderson, an MI6 officer and head of the Russia Desk
Rafe Spall as Stuart Henderson, Kate's husband and a special adviser to Conrad
Alexander Terentyev as Sergei Malinski, an SVR operative, old friend and informant of Kate, codename "Cyclops"
Roger Allam as Sir Alan Brabazon, the Chief of MI6, codename "C"
Avi Nash as Ravindra "Rav" Sangvhi, an MI6 Russia Desk officer working for Kate
Mark Stanley as the Rt Hon Ryan Walker MP, the Foreign Secretary aligned with the centre-right wing of the Labour Party
Alex Kingston as Rose Trewen, the Head of Security for MI6
Amaka Okafor as the Rt Hon Imogen Conrad MP, the Home Secretary aligned with the left wing of the Labour Party
Khalid Abdalla as Zak Hussein, the Deputy Chief of MI6 and Kate's superior
Aoife Hinds as Julie Price, an MI6 Russia Desk officer working for Kate
Rochenda Sandall as Melissa Morris, a special adviser to Walker
Lydia Leonard as Amanda Walker, an auctioneer and Ryan's wife
Steven Elder as the Rt Hon Anthony Fletcher MP, the Prime Minister and Leader of the Labour Party
Alma Prelec as Lena Savic, an MI6 asset and nanny employed by Mikhail Borodin, codename "Echo"
Galaxie Clear as Fiona Henderson, Kate and Stuart's teenage daughter
Harley Barton as Gus Henderson, Kate and Stuart's son
Juris Zagars as Lev Amatov, a British–Russian oligarch and political donor
Michael Tcherepashenets as Mikhail Borodin, Igor's son and Lena's employer
Petar Zekavica
Miglen Mirtchev as Igor Borodin, the Director of the SVR
Samuel Anderson as Harry Conrad, husband of Imogen Conrad
Ben Lloyd-Hughes as Joshua Long
Ed Balls as himself (cameo role)
Susanna Reid as herself (cameo role)
Robert Peston as himself (cameo role)
Oleg Levin as Kyril Markov
Production
The five-part series was commissioned by ITVX in May 2024, with Tom Bradby and Jemma Kennedy adapting Bradby's novel of the same name. Executive producers include Gail Egan and Andrea Calderwood. The series is produced by Potboiler Productions in association with All3Media International.
Stan acquired rights in Australia in February 2025. James Marsh is director on the first three episodes, with Farren Blackburn directing episodes four and five. The cast is led by Gemma Arterton, and includes Rafe Spall, Mark Stanley, Alex Kingston, Amaka Okafor, Khalid Abdalla, Avi Nash and Roger Allam.
Filming began in late March 2025 with filming locations including Malta and London.
Broadcast
The series premiered on 27 April 2026 on ITV1 and ITVX. ITV presenters Ed Balls and Susanna Reid make cameo appearances as themselves in episode two of the series.