Slow Horses season 5 looks to build upon the show’s reputation as one of TV’s smartest and most entertaining thrillers, after season 4 pushed things to new heights for Lamb and the Slough House gang.

Slow Horses season 4 streamed on Apple TV+ just last year, but with season 5 filming back-to-back with season 4, the wait for the show’s return wasn’t expected to be long, and indeed Apple TV+ just updated the release window for season 5, revealing that Slow Horses will return in summer 2025. The update comes as part of a new preview video looking ahead at Apple TV+’s new titles, and features a brief look at Oldman as Lamb.

The completely spoiler-free video clip includes a single moody shot of Lamb appearing disheveled as always, looking at something with an expression of surprise and perhaps dismay, his face reflected in a nearby window (via AppleTV+/X):

What The New Clip Means For Slow Horses Season 5

Jackson Lamb Is Up To His Old Tricks

The brief shot featured in the above clip gives nothing away plot-wise, but does convey a sense of intrigue, as is to be expected from a spy show like Slow Horses. The shot also confirms that Jackson Lamb's grooming habits are not set to improve in season 5, happily for those who enjoy Oldman's eccentric, unkempt performance as the slovenly secret agent who, despite his looks and tendency towards public flatulence, is always one step ahead.

Slow Horses season 6 has already been confirmed.

Plot details for Slow Horses season 5 have not been revealed, but as the episodes are based on Mick Herron’s Slough House novel London Rules, a lot can be pieced together. Going by the book’s plot, one of the bigger show developments could see the ever-obnoxious Roddy Ho (Christopher Chung) being targeted by an assassin. The story could also concern a controversial MP and his tabloid journalist wife going after MI5, even as the service investigates a spate of terrorist attacks.

Our Take On Slow Horses Returning In Summer 2025

The Show's Production Pace Remains Brisk

Slow Horses released season 1 in April 2022, coming back with season 2 in December of the same year. Season 3 came out a year later in November 2023, followed quickly by season 4 in September 2024. Given such a brisk production schedule, it’s no surprise that season 5 is set to come as soon as summer 2025.

Slow Horses may indeed turn around new episodes at a very brisk pace, but there’s never a dip in quality, as the show’s writing remains sharp and its production values high (it helps that the show only has to crank out six episodes per season). Given the series’ track record of delivering strong TV storytelling, it’s safe to bet that season 5 will be more than worth the delightfully brief wait.

Source: Apple TV+/X