Slow Horses season 5 possible release date, cast, plot and more

Note: Contains spoilers for Slow Horses seasons 1-4

Another year, another pile of bodies swept under the carpet or shoved behind the trash cans. The residents of Slough House – those still alive after season four – are wiping down the walls and taping up the broken windows as they prepare for season five. So what can we expect?

Possible release date for Season 5 of Slow Horses

First things first: it's clear that Slow Horses will return. Apple TV+ (officially one of our top streaming services) confirmed that a fifth season has already been commissioned in January 2024.

While the first season debuted in April 2022, seasons two and three were released in December 2022 and 23, respectively, while the fourth season was released a little earlier in September 2024. Assuming a fall release window and a year-long production schedule, we can certainly expect a fifth season September 25th.

However, Gary Oldman confirmed in August 2024 that filming for the fifth season had completed. He told Deadline: “We just finished filming season five and there’s still a layer of the onion being peeled back with Lamb. You learn a little bit more about what happened.”

So, assuming a six-month editing cycle, season five could arrive earlier in the year than usual, possibly even in the spring.

Slow Horses Season 5 Cast

There's no show without Gary Oldman as the walking trash bag Jackson Lamb. Luckily, he confirmed that he will be there until the show drops.

Jack Lowden, who plays River Cartwright, revealed a similar sentiment to Collider: “As long as it's still interesting and people are still interested, I think it's the same with everything, I'd like to do it.”

Unfortunately, Marcus Longridge didn't make it through the fourth season, so it's the last we've seen of Kadiff Kirwan at the Barbican. Joanna Scanlan's role as busy Moira Tregorian appears to be a one-off, so she probably won't be returning either.

Here's who will join Oldman and Lowden if all goes according to plan:

• Saskia Reeves as Catherine Standish
• Christopher Chung as Roddy Ho
• Rosalind Eleazar as Louisa Guy
• Kristin Scott Thomas as Diana Taverner
• Aimee-Ffion Edwards as Shirley Dander
• Naomi Wirthner as Molly Doran
• Ruth Bradley as Emma Flyte
• Tom Brooke as JK Coe
• James Callis as Claude Whelan
• Samuel West as Peter Judd

Slow Horses season 5 plot

As surely as night follows day and as an unidentifiable smell follows Jackson Lamb, season five will follow Mick Herron's book series like clockwork, meaning the plot from book five, London Rules, will be dropped. This means the return of political intrigue surrounding Samuel West's Peter Judd, a series of mysterious terrorist attacks across the country, and major trouble for beleaguered First Desk Claude Whelan.

Plus inappropriate humor and belching at (and at) high volume from Jackson Lamb.

Trailer for Season 5 of Slow Horses

It's too early to have any footage, but keep checking back as we'll post it here as soon as any becomes available.

Seasons 1-4 of Slow Horses are available on AppleTV+.

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