'Slow Horses' Season 5 Premieres This Fall — Here’s Why It’s the Spy Show You Can’t Miss

If you thought the dysfunctional MI5 rejects of Slow Horses were done causing chaos, think again. Apple TV+ just confirmed the premiere date for Slow Horses Season 5, and fans of the gritty, hilarious, and razor-sharp spy thriller should mark their calendars. On September 24, 2025, the gang from Slough House is back—and yes, Jackson Lamb (played with delightfully foul-mouthed finesse by Gary Oldman) is still chain-smoking and insulting everyone in sight.

So what can we expect in Season 5? Well, besides more sarcasm, espionage blunders, and bureaucratic backstabbing, the new season is based on London Rules, the fifth book in Mick Herron’s best-selling Slough House series. Below, we break down what’s coming, who’s returning, and why Slow Horses remains one of the most unexpectedly brilliant shows on streaming.

What Is Slow Horses and Why Should You Care?

If you’re new here, Slow Horses is a British spy drama with a deliciously dry sense of humor. It centers on Slough House, the purgatory of MI5, where disgraced agents go to rot. Except, they somehow always end up saving the day—awkwardly, accidentally, and often after insulting each other mercilessly.

It’s part espionage thriller, part workplace comedy, and all kinds of addictive. Apple TV+ has struck gold by adapting Herron’s darkly comic novels, and with each season, the fan base grows faster than Jackson Lamb can ruin someone’s self-esteem.

Season 5 Premiere Date Confirmed

Apple TV+ will release the first two episodes of Slow Horses Season 5 on September 24, 2025, with new episodes rolling out weekly. That gives you time to either catch up or rewatch the previous four seasons—and let’s be honest, we could all use a little more Oldman grumbling into a bacon sandwich.

What’s Season 5 About? The “London Rules” Are In Play

Season 5 draws from Herron’s London Rules, which means expect chaos, confusion, and covert operations with questionable results. This time around, the action centers on Roddy Ho, the resident IT genius (and self-proclaimed lady-killer), who somehow gets a girlfriend. Spoiler: she might be a terrorist. Or a spy. Or both.

As the gang tries to unravel a tangled web of threats across London, they’ll face new enemies and old grudges—plus the usual amount of snide remarks and bureaucratic roadblocks. If previous seasons are any indication, this will be messy, morally gray, and weirdly touching.

Who’s in the Cast? The Misfits Return

Returning cast members include:

• Gary Oldman as Jackson Lamb (the world’s most offensive babysitter)

• Jack Lowden as River Cartwright (still trying to prove he’s not a total failure)

• Kristin Scott Thomas as Diana Taverner (MI5’s icy Second Desk)

• Rosalind Eleazar as Louisa Guy

New additions to the cast include Nick Mohammed (of Ted Lasso fame) and Hiba Bennani, bringing fresh energy—and probably more problems.

Why Fans Are Hyped

Let’s be real: Slow Horses isn’t your average slick spy drama. It’s smarter. Sharper. And way more fun. The dialogue crackles, the stakes feel real, and somehow, it manages to balance absurdity with genuine emotion. If you’re tired of overly polished espionage shows, this one’s for you.

And with Season 6 already confirmed—based on Joe Country and Slough House—there’s plenty more to come.

Mark Your Calendar, Saddle Up

Slow Horses Season 5 drops on September 24, 2025, only on Apple TV+, and it’s shaping up to be another wild ride through the darker corners of British intelligence. Whether you're in it for the espionage, the insults, or the intrigue, this show continues to prove that even the worst spies can sometimes get the job done—just not gracefully.

So grab your trench coat, your sarcasm, and maybe a gas mask (if Lamb’s been in the office). Slough House is open for business again.

Ready to catch up or start from the beginning? Head over to Apple TV+ and binge responsibly. Or irresponsibly—we won’t judge.