Slow Horses will return for a fourth season in September.
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Apple TV+ shared a first-look photo and premiere date, Sept. 4, for Season 4 on Thursday.
Slow Horses is a spy drama based on the Slough House book series by Mick Herron. Season 4 adapts Spook Street, the fourth novel in Herron's series.
Gary Oldman returns as Jackson Lamb, the leader of the dysfunctional team of MI5 rejects known as the Slow Horses.
Season 4 opens with "a bombing that detonates personal secrets, rocking Slough House's already unstable foundations."
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Kristin Scott Thomas, Jack Lowden, Saskia Reeves, Rosalind Eleazar, Christopher Chung, Aimee-Ffion Edwards, Kadiff Kirwan and Jonathan Pryce also star, with Hugo Weaving, Joanna Scanlan, Ruth Bradley, Tom Brooke and James Callis to join the cast.
Season 4 will have a two-episode premiere Sept. 4.
Slow Horses was renewed for Season 5 in January.