After a volatile sixth season, the spy-drama Slow Horses delivered a jaw-dropping finale that has fans reeling — and the showrunner has shed light on its darkest moments. Meanwhile, Apple TV dropped the first trailer for Season 7, which hints at what’s coming next, with production already wrapped and a premiere expected around September 2027.
What happens in the finale
Fatalities have exploded this season, and Emma Fly is the costliest victim: she dies at the hands of Frank Harkness, River’s father. But the coup de grâce hits when River Cartwright seemingly kicks the bucket too, in a scene that’s both shocking and ambiguous.
Showrunner Gaby Chiappe explains that the seeds of River’s apparent demise were planted early in the season. In Episode 2, assassins Jim and Jane are searching for him and Sid, and a bottle plus a crowbar—brought in by River—appear in that doorway. The implication? The crowbar has been laced with a nerve agent, most likely Novichok. While Chiappe doesn’t explicitly confirm River’s death, the way the finale trajectory is framed and the trailer for Season 7 suggests he may indeed be gone.
Season 7 trailer and what’s ahead
At the end of the season 6 finale, the world got its first look at Season 7’s teaser. Apple TV has confirmed that Slow Horses is returning for not just one more round, but it has been renewed through Season 8. Filming for Season 7 is already complete, and everything points to a release around September 2027.
The trailer doesn’t hold back: it visually underscores River’s alleged fate, setting up expectations for intense fallout, new threats, and the emotional weight the rest of the team will carry.
This season’s finale isn’t just about action—it’s about storytelling that connects seemingly minor details (a bottle, a crowbar) to life-or-death stakes. For longtime viewers of Mick Herron’s novels, this isn’t far from the text. But for those watching just the show, it’s a reminder of how carefully planted moments can explode into massive consequences.
As we await Season 7, the most burning question remains: Is River dead for good? Visuals from the teaser and hints from Chiappe suggest so, but nothing feels final yet. Stakes are higher than ever, and Slow Horses has never been better at leaving us gasping.
In the next year, everything hinges on River’s fate—and how this death (if it is one) reshapes the warped, morally gray world of Slough House.
