‘Slow Horses’ Season 7: Premiere Date Expectations, ‘Bad Actors’ Book Summary, and New Cast Additions

Apple TV+ has officially renewed its acclaimed spy thriller “Slow Horses” for a seventh season, adapting the eighth novel in Mick Herron’s Slough House series, “Bad Actors.” No official release date has been set, but the show is expected to continue with its yearly run, and a few new cast members have already been added.

The source material for ‘Slow Horses’ Season 7 will be Mick Herron’s 2022 novel ‘Bad Actors’, the eighth novel in the Slough House series. Apple TV+ has officially renewed the six-episode season and brought in cast members Varada Sethu and Tuppence Middleton. There’s no official premiere date, but based on the show’s historical release pattern, a late 2026 or 2027 premiere window is likely.

Apple TV+ has renewed “Slow Horses” for a seventh season, keeping its promise to adapt all of Mick Herron’s Slough House novels for the screen. Next season there will be six episodes, in the same format as previous seasons.

The production has already begun expanding its ensemble. Varada Sethu and Tuppence Middleton are now confirmed to be joining the series, alongside returning cast member James Callis. Gary Oldman is expected to reprise his role as the irascible MI5 outcast Jackson Lamb, along with the rest of the main cast, but Apple TV+ has not yet released a full character breakdown for the new season.

Season 7 is adapted from “Bad Actors,” the eighth novel in Mick Herron’s Slough House series, published in 2022.

At the heart of the story is a brewing scandal in British intelligence when a key member of a Downing Street think tank disappears without a trace. Claude Whelan is a veteran MI5 intelligence officer from the “old guard” who has been assigned to investigate the disappearance.

Whelan makes his way through the upper echelons of government bureaucracy, and the story naturally crosses with Jackson Lamb and his dysfunctional team of castaway spies at Slough House. True to the series’ tone, “Bad Actors” blends searing political satire with high-stakes espionage to expose incompetence and covert agendas at every level of the intelligence community.

Apple TV+ has renewed the series, and in its renewal announcement, the streaming service noted the show’s global success. “Slow Horses has become a global hit with its unique mix of spy thriller and dark comedy,” a network rep said at the time of the renewal announcement.

Author Mick Herron has always been a fan of the TV adaptation and its ability to capture the cynical, gritty feel of his novels, while still letting the characters grow organically on screen. The renewal for a seventh and eighth season came at the same time, suggesting the network has strong confidence in the long-term viability of the Slough House universe.

“Slow Horses” has been renewed for a seventh season, cementing its place as one of Apple TV+’s most consistently excellent and critically acclaimed flagship dramas. In an age of streaming platforms canceling genre shows after two or three seasons, the ongoing investment speaks to the value of loyal, quality literary adaptations.

Moreover, the reworking of “Bad Actors” allows the series to explore more deeply the connection between direct political influence and intelligence operations. This theme is becoming more relevant in today’s geopolitical conversations.

No official premiere date has been announced for “Slow Horses” Season 7 yet. However, industry experts are expecting a release window in late 2026 or 2027, based on the show’s track record of releasing one season per year. The show is expected to debut its official teaser trailer and announce a production start date several months before it premieres on Apple TV+.