Slow Horses season 4: Release date, cast, plot and all we know so far

Apple TV+’s smash-hit spy series Slow Horses is revving up for a fourth season, and the buzz around the cast, storyline, and release date is already electric. The show, which first graced our screens in 2022, is based on Mick Herron’s Slough House novels. It tracks a quirky crew of MI5 agents, tasked with defending England from threats near and far, all while managing their eccentric boss. Led by the incomparable Gary Oldman, Slow Horses flips the spy genre on its head with sharp wit and unrelenting suspense.

From its debut, Slow Horses has been a critical darling, consistently racking up scores north of 90% on Rotten Tomatoes. Reviewers rave about its sharp writing and stellar ensemble cast, which together bring Mick Herron’s vision of a government filled with flawed humans to life—standing in stark contrast to the usual parade of invincible action heroes. Shows like Slow Horses are a rare find, and Apple TV+ is clearly over the moon with its performance, hailing it as one of their premier original programs. Fans, rejoice: season 4 of Slow Horses is arriving sooner than you might expect.

Slow Horses Season 4 Latest News

After months of radio silence, the latest buzz from Apple TV+ is music to fans’ ears: the release date for Slow Horses season 4 is finally here. The Gary Oldman-led spy series, which has been steadily gaining momentum over its first three seasons, is set to return in September 4, 2024 (via Collider). This announcement comes less than a year after the premiere of season 3, proving that streaming-exclusive shows can indeed keep a brisk pace between seasons. Season 4 will kick off with a double-header, premiering two new episodes before settling into its weekly release schedule.

Slow Horses Season 4 Release Date

Proving that streaming-exclusive shows can keep a brisk pace, Slow Horses season 4 is set to arrive less than a year after the season 3 debut. Apple TV+’s hit spy series will drop two new episodes on Wednesday, September 4, 2024, before switching back to its weekly release schedule. The speedy turnaround is thanks to Apple TV+ renewing the show for both seasons 3 and 4 simultaneously, allowing them to film back-to-back.

Slow Horses Season 4 Cast

Unlike other shows that announce a new season with scant details, Slow Horses season 4 comes packed with information about its cast. This season, several new faces will join the roster, including Hugo Weaving (The Matrix), Joanna Scanlan (Notes on a Scandal), James Callis (Battlestar Galactica), Ruth Bradley (Guilt), and Tom Brooke (Empire of Light). While their roles remain a mystery, their inclusion adds an exciting new dynamic to the series.

Fans will be pleased to know that the entire main ensemble will return, with Gary Oldman reprising his role as the slovenly leader of Slough House, Jackson Lamb. Jack Lowden is back as the young agent River Cartwright, alongside Kristin Scott Thomas as Diana Taverner and veteran character actor Jonathan Pryce as David Cartwright.

Here’s the complete known cast of Slow Horses season 4:

With such a stellar cast, season 4 of Slow Horses promises to be as thrilling and entertaining as ever.

Slow Horses Season 4 plot speculation 

With the announcement of Slow Horses season 4, fans were treated to a tantalizing hint about the upcoming episodes. Season 4 will “open with a bombing that detonates personal secrets, rocking the already unstable foundations of Slough House.” This cryptic teaser echoes the plot of Mick Herron’s novel Spook Street, suggesting that each season of the series adapts a single book from the series.

In Spook Street, a former spy slowly loses his mind, leading him on a deadly rampage that includes bombing a crowded shopping mall. This personal connection is likely to be the crux of season 4, as the members of Slough House confront their own failures and question the true meaning of being an MI5 agent. While it’s uncertain how closely Slow Horses season 4 will adhere to the book, it promises to be the most gripping season yet.