There's nothing worse than settling into a promising new series, only to hit a mid-season slump that makes you reach for your phone. Filler episodes can kill the momentum of even the most gripping shows, and spy thrillers are no exception. The Day of the Jackal, Killing Eve, and Homeland have all stumbled with unnecessary subplots or meandering installments. But if you're hunting for a spy thriller that never wastes a minute, Apple TV's Slow Horses is the answer.
What Is 'Slow Horses' About?
Premiering in 2022, Slow Horses has quietly become one of the most acclaimed series on streaming, earning Emmy nominations and a devoted fanbase—even if it hasn't reached the mainstream fame of some other spy dramas. Each season packs just six episodes of taut, twisty storytelling, and with Season 6 arriving next month, now is the perfect time to catch up.
The show follows a group of disgraced MI5 agents who've been banished to Slough House, a dumping ground for spies who've messed up. Known as the "Slow Horses," they're desperate to claw their way back into the intelligence service, but their boss, the irascible and perpetually disheveled Jackson Lamb (played with scene-stealing brilliance by Gary Oldman), seems more interested in napping on his office couch than mentoring them.
At the center is River Cartwright (Jack Lowden), a young agent relegated to Slough House after a disastrous training exercise. River's goal is to redeem himself, but along the way, he and his fellow misfits form an unlikely family. Each season throws them into a new, high-stakes investigation, and despite everyone underestimating them, they keep saving England from disaster.
An Addictive, Action-Packed Thrill Ride
Based on Mick Herron's acclaimed novels, Slow Horses is a masterclass in suspense. Danger lurks around every corner, and the show isn't afraid to kill off major characters, keeping the stakes sky-high. Because the seasons are so compact, there's no room for filler—every scene drives the plot forward and deepens the characters.
What truly sets Slow Horses apart is its character work. Whether it's the icy MI5 boss Diana Taverner (Kristin Scott Thomas) or the growing bonds among the Slough House team, the series creates people you genuinely care about. The writing is sharp, but the cast elevates it to another level. Oldman's portrayal of Jackson Lamb is a career highlight, balancing grumpiness with a hidden depth that never feels like a caricature. Lowden is equally impressive, capturing River's frustration and sly humor with ease. The supporting cast—including Saskia Reeves, Rosalind Eleazar, and Christopher Chung—adds layers of authenticity, and it's no surprise that Oldman, Lowden, and Jonathan Pryce have all earned Emmy nominations.
Apple TV clearly knows it has a gem here. With a staggering 97% Rotten Tomatoes score and Season 7 already greenlit, Slow Horses is a must-watch for any spy thriller fan. If you're looking for more binge-worthy crime shows, check out our list of addictive crime picks. And if you're in the mood for other spy adventures, Rami Malek's The Amateur is now streaming on Prime Video.
Seasons 1–5 of Slow Horses are available on Apple TV, with Season 6 premiering September 16. Don't miss out on one of the best spy thrillers of the decade.
