The fourth season of the British spy series 'Slow Horses' is set to premiere on Apple TV+ on September 4, 2024, with the first two episodes dropping simultaneously, followed by weekly releases. This season, adapted from Mick Herron's novel 'Spook Street', begins with a bombing that reveals personal secrets among the dysfunctional team of spies in MI5's lesser-known department, Slough House. The show, starring Gary Oldman as Jackson Lamb, has gained significant acclaim, recently earning nine Emmy nominations for its previous season, including Outstanding Drama Series. Alongside Oldman, the returning cast includes Kristin Scott Thomas, Jack Lowden, and Jonathan Pryce. The series continues to be produced by See-Saw Films, with a fifth season also confirmed. Fans of the show can expect a mix of dark humor and espionage drama as it unfolds in its new season.