Director: Farren Blackburn, James Marsh

Cast: Gemma Arterton, Rafe Spall, Mark Stanley, Alex Kingston, Roger Allam

Secret Service is a 2026 British drama-thriller series directed by Farren Blackburn and James Marsh, following an MI5 intelligence officer as she races to expose a sitting politician's suspected ties to the Kremlin — all while a murder investigation and a looming election threaten to upend everything she holds dear.

What is Secret Service about?

Kate Henderson is a seasoned British intelligence officer whose latest assignment sends her into the murky overlap between high-level politics and foreign espionage. When evidence surfaces suggesting that a prominent UK politician may be feeding information to Russian handlers, Kate begins a covert investigation that demands she work outside official channels. As she digs deeper, the stakes escalate: a violent death reshapes the inquiry, and an impending national election compresses her window to act. Every alliance she trusts comes into question, and the personal cost of chasing the truth — her reputation, her relationships, her safety — grows heavier with each episode. The series builds its tension through procedure and character rather than spectacle, keeping its central mystery genuinely uncertain until the final stretch.

Cast & crew

Gemma Arterton leads as Kate Henderson, bringing a grounded intensity to the role of an officer navigating institutional loyalty and personal conscience. Rafe Spall and Mark Stanley provide pivotal supporting turns, while Alex Kingston and Roger Allam add authoritative gravitas to the political and intelligence hierarchy surrounding Kate. Khalid Abdalla and Avi Nash round out the ensemble.

Context & significance

British espionage drama has long found an enthusiastic audience among Iranian diaspora viewers who grew up with a deep awareness of how intelligence services and political power intersect — a reality that resonates across cultures. Secret Service arrives with Persian dubbing, making it fully accessible to viewers who prefer to watch in their own language. The series touches on themes of state manipulation, dual loyalties, and the cost of institutional honesty that speak directly to communities shaped by political displacement. For Persian-speaking audiences across Canada, the US, and Europe, the genre offers a familiar dramatic rhythm while delivering a distinctly British backdrop worth exploring.

Where & how to watch

Secret Service is available on K-Time with a full Persian dub and Persian subtitles. Stream it in your browser, on your TV, or on your phone — no VPN required, no geo-blocking, no extra download needed. Subscribe and cancel anytime.