Spy stories love a sheen: tailored suits, glassy headquarters, and heroes who look like they slept in a briefing memo. Slow Horses delights in the opposite—burnt coffee, bad fluorescent lighting, and people who feel like they’ve been “misfiled” by an institution that runs on paperwork and grudges. And yet, none of it is accidental. The series’ greatest trick is how carefully its mess is designed.
Start with the sound. The opening theme, “Strange Game,” doesn’t just set a mood—it’s a statement of purpose: this is espionage as attrition, not adrenaline. Variety reports that Mick Jagger wrote lyrics and performed the song after composer Daniel Pemberton shared an instrumental main title and the concept for the opening sequence, making it Jagger’s first TV theme. That detail feels perfectly on-brand: a rock icon lending swagger to a show that otherwise insists swagger is overrated.
Then there’s the pace. In the streaming era, momentum is a superpower, and the production has leaned into it. The show has been able to roll out seasons quickly in part because it has shot seasons back-to-back, a schedule noted in the series’ production background. That kind of pipeline changes what TV can feel like: less like a once-every-few-years “event,” more like a living, ongoing job—again, exactly the vibe this series thrives on.
The “realness” extends to London itself. Rather than hiding behind anonymous stages, the series makes the city’s ordinary corners do the work. Time Out points to Aldersgate Street near the Barbican as the exterior area used for the drab headquarters façade. It’s an inspired choice: the building doesn’t scream “secret agency,” which is precisely why it works.
And the clothes—arguably the show’s sharpest writing tool. The Television Academy’s costume feature quotes designer Guy Speranza on aiming to make the characters look “as British as they can be,” with wardrobe choices that telegraph status, self-image, and stubbornness. One of the most delicious contradictions comes via a specific accessory: ScreenFinds notes that Speranza sourced Edward Green shoes for Jackson Lamb, a quietly premium detail peeking out from the character’s generally disheveled presentation. It’s the kind of costume note that tells a whole backstory without ever raising its voice.
Even the star’s approach is anti-vanity. In an ABC News interview, Gary Oldman explains that he didn’t want prosthetic makeup for the role—favoring a simpler, repeatable physical approach instead of elaborate transformations. The result is a character who feels lived-in rather than “built,” as if he’s been occupying the same battered chair for years.
Put it all together, and Slow Horses becomes a masterclass in controlled chaos: carefully crafted dowdiness, a theme song with a legendary bite, and a London you can actually walk through—proof that in spycraft, as in storytelling, the most convincing disguises are often the plainest.