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TV SERIES · Drama / War & Politics / Crime

Secret Service.

When the enemy is closer than you think, who do you trust?

6.7 / 1020261 seasons5 episodesReturning Series

A British intelligence officer Kate Henderson races against time to uncover a UK politician's potential ties with the Kremlin, risking her reputation and family, as a murder and election loom.

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Created by Tom Bradby

THE STORY CONTINUES

Season 1.

Episode 1

2026-04-27 · 47m6.0

An MI6 agent learns that there is a Russian asset in the UK Cabinet.

Episode 2

2026-04-28 · 48m7.8

Kate suspects that her agent is in danger and, defying orders, prepares to rescue her.

Episode 3

2026-05-03 · 44m7.8

Kate's bold rescue mission in Malta backfires and she draws flak from all sides.

Episode 4

2026-05-04 · 45m7.5

The pressure mounts on Kate when the Russians target her family, and Rav follows clues to Geneva.

Episode 5

2026-05-05 · 46m6.0

Kate runs Cyclops in an audacious mission inside Moscow Secret Service HQ to finally trap the MI6 mole.

Cast.

Gemma Arterton

Gemma Arterton

Kate Henderson

Rafe Spall

Rafe Spall

Stuart Henderson

Alexander Terentyev

Alexander Terentyev

Sergei Malinski

Roger Allam

Roger Allam

Sir Alan Brabazon

Avi Nash

Avi Nash

Ravindra Sangvhi

Mark Stanley

Mark Stanley

Ryan Walker

Alex Kingston

Alex Kingston

Rose Trewen

Amaka Okafor

Amaka Okafor

Imogen Conrad

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