Apple TV confirms that “Slow Horses” will return for its sixth season on September 16. The season consists of six episodes, which premiere weekly on Wednesdays through October 21. The series follows misfit MI5 agents who are reassigned to Slough House, a “dumping ground” unit led by Jackson Lamb, played by Gary Oldman. Multiple outlets report that Apple has released a first glimpse from the upcoming season featuring Oldman as Lamb. Deadline additionally notes that season 6 introduces a new character, Lenny Rush, played by BAFTA winner Lenny Rush, and positions the plot around the Slough House team being put “on the run” as Diana Taverner (Kristin Scott Thomas) pulls them into a high-stakes situation. Across the announcements, the release schedule and the new-season first look are the key shared details, with the introduction of Lenny Rush highlighted as a new addition to the cast for the upcoming episodes.