7 Explosive Secrets About The New Episodes Of Slow Horses: What's Next For Jackson Lamb And Slough House?

The world of disgraced intelligence agents at Slough House remains a hotbed of espionage and dark humor, with Apple TV+'s *Slow Horses* delivering its most recent and critically acclaimed season to date. As of December 12, 2025, the latest installment, Season 5, has recently concluded its run, leaving fans of the spy thriller series hungry for more of Jackson Lamb's cynical brilliance and the misadventures of his "slow horses." The good news is that the future of the series is more secure than ever, with explosive updates confirming not just one, but two more seasons are already in the works. The series, which masterfully blends high-stakes espionage with the mundane reality of MI5's failures, has cemented its place as one of the best spy dramas on television. With the immediate drama of Season 5 now wrapped, all eyes are turning to the confirmed production schedules for Seasons 6 and 7, promising a continuation of Mick Herron's thrilling literary universe.

The Slough House Dossier: Season 5 Release and Full Cast Biography

Season 5 of *Slow Horses* officially premiered on Wednesday, September 24, 2025, on Apple TV+. The season, which consisted of six episodes, followed the show's signature weekly release pattern, concluding with the finale on Wednesday, October 29, 2025. This installment was based on the fifth novel in Mick Herron's *Slough House* series, titled *London Rules*. The core of the series' success lies in its stellar ensemble cast, a mix of seasoned veterans and rising stars, all playing their roles in the purgatory of Slough House.

• Gary Oldman as Jackson Lamb: The slovenly, flatulent, yet brilliant head of Slough House. Oldman, an Academy Award winner, anchors the series with his darkly comedic and cynical performance.
• Jack Lowden as River Cartwright: The ambitious but disgraced grandson of a legendary MI5 agent. His character often drives the action and the connection to the "proper" MI5.
• Kristin Scott Thomas as Diana Taverner: The ambitious and ruthless Deputy Director-General of MI5, known as "Second Desk," serving as Lamb's primary foil.
• Saskia Reeves as Catherine Standish: Lamb’s long-suffering and highly competent administrative assistant, a recovering alcoholic with a complex past.
• Rosalind Eleazar as Louisa Guy: A former MI5 agent who is one of the most capable operatives among the slow horses.
• Christopher Chung as Roddy Ho: The socially inept but technologically genius hacker of the group, providing crucial technical support.
• Freddie Fox as James "Spider" Webb: A slick and often untrustworthy MI5 agent who frequently interacts with the Slough House team.

The Season 5 plot, adapted from *London Rules*, saw the slow horses facing a new, terrifying threat: a series of seemingly random terror attacks that point toward a sinister, deeper conspiracy that could expose MI5's deepest secrets.

The Shocking Season 5 Finale and Episode Release Schedule

The fifth season, consisting of six intense episodes, maintained the show's reputation for tight plotting and shocking twists. The weekly release schedule kept fans on the edge of their seats, a format that Apple TV+ has successfully utilized for the series.

Full Slow Horses Season 5 Episode Guide:

• Episode 1: "Bad Dates" (Premiered: Wednesday, September 24, 2025)
• Episode 2: "Incommunicado" (Premiered: Wednesday, September 24, 2025)
• Episode 3: "Title TBD" (Premiered: Wednesday, October 1, 2025)
• Episode 4: "Title TBD" (Premiered: Wednesday, October 8, 2025)
• Episode 5: "Title TBD" (Premiered: Wednesday, October 15, 2025)
• Episode 6: "Finale" (Premiered: Wednesday, October 29, 2025)

The finale of Season 5 successfully wrapped up the high-stakes political thriller that unfolded throughout the season, with Jackson Lamb and his team once again proving their worth by operating outside the rigid, often compromised, structure of MI5. The season explored themes of deep-state corruption, political manipulation, and the constant struggle for the slow horses to regain a semblance of respect, even if only in their own bizarre corner of the intelligence world.

For those new to the series, the preceding Season 4 was equally dramatic, kicking off with a literal bomb explosion and culminating in a harrowing confrontation involving River Cartwright and the dramatic reveal of his family's history, specifically his estranged father, Frank Harkness.

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Confirmed Future: Slow Horses Season 6 and Season 7 Updates

The most exciting and up-to-date news for fans is the confirmed future of the *Slow Horses* television adaptation. Apple TV+ has already greenlit both Season 6 and Season 7, a testament to the show's exceptional quality and dedicated fanbase.

Season 6: Based on "Joe Country"

The sixth season is expected to adapt the sixth novel in Mick Herron's series, *Joe Country*. Reports indicate that the production for Season 6 has either recently wrapped or is in the final stages of filming, suggesting a relatively quick turnaround for its release.

The plot for *Joe Country* sees the slow horses on the run, with the narrative focusing heavily on a mission that takes them out of London and into the remote, dangerous territory of rural England. The book is known for its intense action and a significant focus on one of the main characters facing a personal crisis, further exploring the dark corners of the British intelligence landscape.

Season 7: The Adaptation of "Bad Actors"

In a surprise move that demonstrates the long-term commitment to the series, Gary Oldman himself has confirmed that filming for a seventh season is scheduled to begin in late October 2025. This rapid-fire production schedule ensures that the gap between seasons will be minimal.

Season 7 is slated to adapt the eighth novel in the series, *Bad Actors*. This book typically involves a kidnapping plot with political ramifications, pushing the boundaries of what the slow horses can handle and putting them directly in the crosshairs of powerful, unseen forces. The show's creator, Will Smith, continues to oversee the adaptation, ensuring the series maintains the sharp wit and political cynicism of Herron's original work.

This commitment to adapting the full *Slough House* series, including the novels *Dead Lions*, *Real Tigers*, *Spook Street*, *London Rules*, *Joe Country*, and *Bad Actors*, solidifies the show's topical authority and provides a wealth of source material for years to come. Fans can look forward to more thrilling espionage, political intrigue, and, of course, the unparalleled curmudgeonly genius of Jackson Lamb.

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