Gary Oldman is back as an obnoxious spy in Slow Horses season 4

Combining comedy with espionage, Slow Horses season 4 is not one to be missed. Apple TV+ has announced the release date, and seeing as the show was filmed back-to-back with season 3, it came as no surprise that we wouldn't have to wait that long for the next instalment of the TV drama!

Here's everything you need to know.

What is Slow Horses about?

If you're new to the show, Slow Horses follows a group of dysfunctional MI5 agents - lead by their obnoxious boss, the notorious Jackson Lamb - that have been sent to Slough House for making a mistake on the job.

There are four seasons altogether and Apple TV have already commissioned it for a fifth series.

Slow Horses season 4 release date

Season 4 of Slow Horses is coming to Apple TV+ on the 4th September 2024. With two episodes being released on that day, the remaining four will be released weekly, with the finale debuting on Wednesday 2nd October.

Slow Horses cast

Of course, it wouldn't be Slow Horses without Gary Oldman, so the actor is back as Jackson Lamb, the slovenly, formidable spy. Jack Lowden is also reprising his role as spy River Cartwright, as is Kristin Scott Thomas as Diana Taverner, the Deputy Director General of MI5.

Here's the full cast of Slow Horses season 4:

Plot of Slow Horses season 4

The iconic drama is based on the Slow Horses books by Mick Herron, with season 4 focusing on Spook Street.

To keep the suspense alive, most of the plot details from Slow Horses' newest series are still under wraps, other than a line from a press release which says that the first episode will "open with a bombing that detonates personal secrets, rocking the already unstable foundations of Slough House".

Slow Horses books

Here's the blurb: "Twenty years retired from the Intelligence Service, David Cartwright still knows where all the bones are buried. But when he forgets that secrets are supposed to stay hidden, there's suddenly a target on his back.

"The 'Old Bastard' raised his grandson to be a hero, not a slow horse. Now, far from joining the myths and legends of Spook Street, River Cartwright is part of Jackson Lamb's team of pen-pushing no-hopers at Slough House. Which doesn't mean he won't ditch everything and go rogue when his grandfather comes under threat.

"Lamb worked with Cartwright back in the day, and knows better than most that this is no innocent old man. So when a panic button raises the alarm at Intelligence Service HQ, it's Lamb who's called on to identify the body. And it's Lamb who'll do whatever's necessary to protect an agent in peril."

Where to watch Slow Horses

Catch all Slow Horses seasons 1-3 on Apple TV+, either on your streaming device, smart TV or iPhone.

Slow Horses season 4 trailer

Currently, there isn't a trailer for the new season, but we reckon that it will be released very soon, seeing as the first episodes drop onto the streaming service in a few weeks time.

Arabella Horspool is a Commercial Content Writer for Yours at Bauer Media. She's a bookworm who is passionate about TV, film and theatre. She enjoys cooking, scrapbooking, playing board games and spending time with her pet dogs, tortoise and chickens.