Tom Bradby (novel) & Jemma Kennedy (Show creator)

CAST

Gemma Arterton
Rafe Spall
Mark Stanley
Alex Kingston
Roger Allam
Khalid Abdalla

Review

I’m an easy sell when it comes to spy thrillers, so Secret Service already had my attention. Add to that cast members like Gemma Arterton and Alex Kingston, and honestly, I was always going to check it out.

Right from the start, the setup pulls you in. We follow Kate Henderson, a British intelligence officer who’s just trying to track Russia’s growing influence in the UK. Simple enough… until it’s not. What begins as routine intelligence work quickly spirals into something much bigger. There’s a potential political scandal that could explode at the worst possible time. It’s that classic “pull one thread and everything unravels” kind of storytelling, and it works really well here.

What I liked most is how grounded it all feels. There’s no over-the-top action for now, or flashy set pieces in the pilot. Instead, it leans into tension, conversations, and that creeping sense that something is about to go very wrong. The tagline “When the enemy is closer than you think, who do you trust?” is intriguing enough for me. You can feel that paranoia building from the marketing alone, plus the rising tension.

Gemma Arterton is doing a lot of the heavy lifting, and she makes it look effortless. She plays Kate with this natural, understated intensity that makes everything feel believable. You buy her as someone who’s smart, capable, but who has to navigate the politics of her job. The supporting cast is solid, too; they add another layer of credibility to the whole thing with the different dynamics at play.

The tension they managed to build in just the pilot is great. I knew I was properly hooked when I got to the final ten minutes of the episode and genuinely had to pause because I was getting too anxious. Not many shows manage to do that in a pilot. It’s not loud or dramatic, it just quietly tightens the screws until you’re completely locked in.

What also stands out is how timely the story feels. Without hitting you over the head with it, the show taps into very real, very current anxieties about politics, foreign influence, and trust. That realism gives this show an edge; it’s the kind of story that feels like it could be happening now.

At this point, if there’s one thing I’m slightly wary about, it’s whether the show will lean into the more obvious twists or not. There’s a particular direction it could take that feels a bit predictable, and I’m really hoping it resists that and goes for something more surprising. The pilot sets up a lot of potential, so it would be a shame to see Secret Service play things too safe.

Overall, this is a strong start. It’s tense, smart, and driven by solid performances. If the rest of the season can maintain or plus this level of intrigue without falling into predictable territory, Secret Service could end up being something special.

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