Skip to Content

Add The Streamable as a preferred source on Google to see more streaming news and deals.

‘Slow Horses,’ Apple TV+’s Most Reliable Series, Returns With Excellent and Explosive Fourth Season

‘Slow Horses,’ Apple TV+’s Most Reliable Series, Returns With Excellent and Explosive Fourth Season

The Emmy-nominated series returns on Sept. 4 with the perfect mix of suspense, dry wit, and flatulence.

Season 4 of “Slow Horses” debuts on Apple TV+ on Sept. 4 and remains one of the best shows on television. The latest installment is as explosive as ever with a break-neck pace and a lot of action (and dry wit) packed neatly into its six-episode arc. Any of the typical slow cloak-and-dagger fat you might associate with other spy thrillers has been trimmed here. For newcomers, each season of the series adapts a different book in Mick Herron’s Slough House novel series. In both the books and show, a group of MI5 agents are forced into career purgatory following various work-related sins only to routinely find themselves — often unwittingly — at the center of some of the biggest espionage cases in British history. Led by flatulent and unhygienic super spy Jackson Lamb (played by Oscar winner Gary Oldman), the Slough House team isn’t always successful, but the new season manages to keep you rooting for the motley group of underdogs nonetheless.

In the fourth season — based on Herron’s novel “Spook Street” — River Cartwright (Emmy nominee Jack Lowden) has to come to terms with the mental unraveling of his beloved grandfather (Tony winner and Emmy nominee Jonathan Pryce), himself a legendary MI5 agent. However, what will the government do when someone who knows far too many secrets forgets that they are actually secrets? Unsurprisingly, the story takes the unexpected twists and turns that viewers have fallen in love with over the show’s first three seasons.

The show’s third season is currently nominated for nine Primetime Emmy Awards, including Outstanding Drama Series and individual acting noms for Oldman, Lowden, and Pryce respectively.

Check out the trailer for Season 4 of ‘Slow Horses’:

For Season 4, “Slow Horses” welcomes a handful of cast members led by Hugo Weaving as Frank Harkness, Ruth Bradley as Emma Flyte, James Callis as Claude Whelan, Joanna Scanlan as Moira Tregorian, and Tom Brooke as J.K. Coe. Bradley and Brooke’s characters make for delightful additions to the ensemble, but unfortunately, I didn’t care for James Callis as Claude Whelan as his character comes across as an unfit idiot, even by Slough House standards. While there needs to be a reason that each team member was banished to the espionage hinterlands, this increasingly tiresome bumbling schtick makes you question how MI5 could have ever hired him to begin with.

Even with the few missteps in humor from Whelan, I continue to love the show for its smart and intelligent approach to storytelling. It nails a pitch-perfect tone that balances just enough suspense to be tense, but not enough to keep your nerves high-strung for an entire hour. The show continues to be a masterclass in espionage moderation.

Because of the show’s rapid pacing, it does require near full concentration to keep people, places, and subtle motives straight. As an American, I found it almost necessary to keep subtitles on so that I could catch the decidedly British slang and parse some of the unfamiliar turns of phrase.

With Season 4 premiering on Wednesday, Sept. 4, if you haven’t yet jumped into the show, there is still plenty of time to catch up on the 18 total episodes from the previous three seasons. Whether you are a long-time “Slow Horses” fan, or you are just now catching up, Season 4 should not disappoint.

Apple TV

Apple TV (formerly known as Apple TV+) is a subscription video streaming service for $14.99 per month, offering a growing slate of original series, films, documentaries, and specials. Unlike other platforms that combine licensed titles with originals, Apple TV is built entirely around exclusive programming, making it the home of critically acclaimed hits such as “Ted Lasso,” “Severance,” “The Morning Show,” and “Silo.” Its lineup continues to expand with award-winning dramas, comedies, family-friendly shows, and blockbuster original films like “CODA,” which won the Academy Award for Best Picture.

…

In October 2025, Apple TV agreed to a deal with Formula 1 to exclusively broadcast all Formula 1 races starting with the 2026 season.

Apple TV also features coverage of all regular-season matches for Major League Soccer (MLS) at no additional cost.

On August 28th, 2026, the price of Apple TV was increased from $12.99 per month to $14.99 per month, the second increase in as many years.

The service is available worldwide through the Apple TV app, which is built into Apple devices and supported on most smart TVs, streaming players like Roku and Fire TV, game consoles, and web browsers. Subscribers can watch on demand, download episodes and movies for offline viewing, and stream in 4K with Dolby Vision and Dolby Atmos, where available. Apple TV also offers family sharing, allowing up to six people to use one subscription at no extra cost.

With a competitive monthly price and bundles available through Apple One — which combines Apple TV with Apple Music, Apple Arcade, iCloud storage, and more — the service continues to grow as a key part of Apple’s ecosystem. Apple TV delivers one of the strongest collections of exclusive content in the streaming space for viewers seeking prestige originals, cinematic storytelling, and seamless access across devices.



Add The Streamable as a preferred source on Google to see more streaming news and deals.

DIRECTV Cash Back

Let us know your e-mail address to send your $50 Amazon Gift Card when you sign up for DIRECTV STREAM.

You will receive it ~2 weeks after you complete your first month of service.

Sling TV Cash Back

Let us know your e-mail address to send your $25 Uber Eats Gift Card when you sign up for Sling TV.

You will receive it ~2 weeks after you complete your first month of service.

Hulu Live TV Cash Back

Let us know your e-mail address to send your $35 Amazon Gift Card when you sign up for Hulu Live TV.

You will receive it ~2 weeks after you complete your first month of service.