Slow Horses Season 4 – Complete Guide to Episodes, Cast and Release

The fourth season of Slow Horses brings Jackson Lamb and the misfits of Slough House back to Apple TV+ with a tightly wound story adapted from Mick Herron’s novel Spook Street. The season premiered on September 4, 2024, and consists of six episodes that deepen the personal stakes for several characters while maintaining the series’ trademark blend of espionage and dark humor. Below is a comprehensive guide covering release details, cast, plot, book adaptation, and what comes next. For a refresher on earlier events, see our Slow Horses season 3 recap and guide.

This season continues the show’s run as one of Apple TV+’s most acclaimed originals. With Gary Oldman returning as the disheveled Jackson Lamb, the series has drawn praise for its sharp writing and emotional resonance. Whether you are catching up or looking for specific details, the following sections answer the most common questions about season 4.

When is the Slow Horses season 4 release date?

The season debuted with its first episode on September 4, 2024, on Apple TV+. New episodes were released weekly on Wednesdays, with the finale airing on October 9, 2024. All six episodes are now available to stream on the platform.

Where can I watch Slow Horses season 4?

Slow Horses is an Apple TV+ original series. Season 4 is exclusive to the platform and requires a subscription to Watch Slow Horses on Apple TV+. It is not available on Netflix, Prime Video, or any other streaming service. The entire season is available on-demand.

Is Slow Horses season 4 on Apple TV+?

Yes, Apple TV+ is the sole streaming home for the series. All episodes of season 4 were released on the service.

Can I stream Slow Horses season 4 on Prime Video?

No. The show is not available on Amazon Prime Video. Only Apple TV+ carries the streaming rights.

Who is in the Slow Horses season 4 cast?

The main cast returns for season 4, led by Gary Oldman as Jackson Lamb. Other returning actors include Jack Lowden (River Cartwright), Kristin Scott Thomas (Diana Taverner), Saskia Reeves (Catherine Standish), Rosalind Eleazar (Louisa Guy), Christopher Chung (Roddy Ho), Kadiff Kirwan (Marcus Longridge), and Aimee-Ffion Edwards (Shirley Dander). Notable additions for this season include Jonathan Pryce, Hugo Weaving, Tom Brooke, Joanna Scanlan, Ruth Bradley, and James Callis.

Who dies in Slow Horses season 4?

The exact character deaths in season 4 have not been fully confirmed outside of book spoilers. The season finale involves “impossible decisions” and “sacrifices,” according to episode summaries, but no definitive list of casualties is publicly available. Some deaths from the source novel Spook Street may or may not occur on screen.

Is Gary Oldman in Slow Horses season 4?

Yes, Gary Oldman returns as Jackson Lamb. His performance remains central to the season.

Does Kristin Scott Thomas return for season 4?

Kristin Scott Thomas is back as Diana Taverner, facing increased pressure within MI5 as the plot unfolds.

Is Slow Horses season 4 based on a book?

Yes, season 4 adapts Mick Herron’s fourth Slough House novel, Spook Street. The book was published in 2017 and is widely considered one of the strongest entries in the series. The show follows the novel’s core plot but, as with earlier seasons, makes some adjustments for television pacing.

What book is Slow Horses season 4 based on?

The season is based on Spook Street (2017), the fourth novel in the Slough House series by Mick Herron. You can find the book on Spook Street (the book adaptation) on Goodreads.

How closely does season 4 follow the book?

The show remains faithful to the main narrative beats, including a London bombing, pressure on Diana Taverner, and River Cartwright’s concerns about his grandfather, David Cartwright. Some plot deviations are expected for dramatic effect, but the overarching story matches Spook Street closely. The exact differences have not been catalogued in detail by reviewers.

What is the plot of Slow Horses season 4?

The season follows a London bombing that places Diana Taverner under intense scrutiny. River Cartwright becomes worried about his grandfather’s mental state, while a broader confrontation involving French intelligence and an enemy known only as “the” threatens the entire service. The plot weaves personal and professional crises, leading to a finale that involves high-stakes decisions and sacrifices.

What are the episode titles and release dates for Slow Horses season 4?

Below is the full episode release timeline for season 4. Episodes aired weekly on Apple TV+ starting September 4, 2024.

1. Episode 1: “Identity Theft” — September 4, 2024
2. Episode 2: “A Stranger Comes to Town” — September 11, 2024
3. Episode 3: “Penny for Your Thoughts” — September 18, 2024
4. Episode 4: “Returns” — September 25, 2024
5. Episode 5: “Grave Danger” — October 2, 2024
6. Episode 6: “Hello Goodbye” (Finale) — October 9, 2024

For more details on each episode, visit the Slow Horses season 4 on Rotten Tomatoes page. An additional source for the schedule is the Esquire release schedule article.

What is known and unknown about Slow Horses season 4?

What is the critical reception of Slow Horses season 4?

The season has been well received. On Rotten Tomatoes, season 4 holds a 98% critic score and an 87% audience score. The Guardian described it as “faultlessly directed” and praised Gary Oldman’s performance, noting that his role has evolved into something “occasionally quietly moving.” The series continues to be considered one of Apple TV+’s strongest offerings, balancing tension with dark humor.

Critics have noted that the show remains engaging and that the adaptation of Spook Street works well on screen. For further reading, see The Guardian review of Slow Horses season 4.

What do critics say about Slow Horses season 4?

“The faultlessly directed spy thriller is back with an even more stellar cast – and its lead actor’s role evolving into something that is occasionally quietly moving.”

— The Guardian

“Season 4 hits full flight with razor-sharp writing, a gutsy performance by Gary Oldman, and a surprising emotional core beneath the spy chaos.”

— Rotten Tomatoes Critics Consensus

“Set in the world of MI5’s Slough House, the season adapts Mick Herron’s 2017 novel Spook Street.”

— Wikipedia

For a comprehensive overview, the Slow Horses Wikipedia page (season 4 section) provides a neutral summary of the season’s plot and production.

What is the conclusion on Slow Horses season 4?

Slow Horses season 4 delivers a tightly plotted, emotionally resonant entry in the series. It successfully adapts Spook Street while maintaining the show’s signature tone. With strong performances, especially from Gary Oldman, and a finale that sets up future seasons, it is a must-watch for fans of spy thrillers. For more background on earlier events, see our Slow Horses season 3 recap and guide.

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