Secret Service is currently streaming in the UK on ITVX Premium, and its 7/10 TMDB rating reflects what viewers who have already found it know. A tightly focused run that does not overstay its welcome. That rating comes from 22 viewer scores — enough to represent a genuine consensus rather than a handful of enthusiasts. The availability across streaming platforms means you can start tonight without hunting for a disc or a dodgy stream. Gemma Arterton is the obvious draw, but once you are in, it is the writing and the ensemble that keep you watching. If it has been sitting on your watchlist untouched, there is no better time to finally start it.

The procedural format gives Secret Service its backbone, but it is the characters you come back for. 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. Gemma Arterton and Rafe Spall lead a cast that brings real weight to the material. It aired in 2026. It delivers reliably on what it promises, which is more than most of its competition manages. What distinguishes the best crime dramas from the rest is whether the character work can carry episodes where the mystery takes a breath — Secret Service passes that test consistently.

If you are the type who cannot walk away from a good mystery, Secret Service will keep you watching far longer than you planned. The run is short enough to finish in a weekend but substantial enough to feel satisfying. The procedural elements give the show its rhythm, but it is the character development across the run that creates genuine investment. Viewers who think they have seen every variation of the crime drama format tend to find Secret Service goes somewhere they were not expecting. The writing takes the genre seriously without disappearing into self-referential games, and the result is a show with genuine momentum — the kind where you finish an episode and immediately start the next.