Slow Horses returns for season 6 next month, and the new trailer reveals that two major characters are returning to the show—one of which was believed dead.

Apple TV is currently airing one of its most beloved series, Ted Lasso. And another fan-favorite returns soon.

Slow Horses season 6 premieres Wednesday, September 16 with one episode, followed by weekly releases through October 21.

If you want to go into the next season of Slow Horses completely spoiler-free, stop reading here.

Apple shared the trailer for Slow Horses season 6 today, and it reveals a pair of noteworthy returning characters. One of them has been absent from the show since its first season, when they were believed killed off.

Here’s the trailer:

As the trailer reveals, season 6 looks set to bring back several former Slough House members.

The most surprising, seen at the end of the trailer, is Olivia Cooke (House of the Dragon) reprising her role as Sidonie “Sid” Baker. She was presumed dead after season 1.

Another big returning star is Hugo Weaving, a major villain in season 4 who we previously learned has a lot of significance to River Cartwright.

You can watch Slow Horses here on Apple TV.

What do you think of the Slow Horses trailer? Let us know in the comments.

Apple TV is available for $12.99 per month, or you can get it discounted through the Apple One bundle.

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