The TV series Slow Horses has 6 episodes per season. Season 5, which premiered on September 24, 2025, also consists of 6 episodes. This follows the format of previous seasons, each having 6 episodes. The fifth season continues the story of the disgraced MI5 team with a new gripping case and stars Gary Oldman, Jack Lowden, and others. The episodes are released weekly on Apple TV+, usually on Wednesdays, with Season 5 scheduled to conclude on October 29, 2025. So each season of Slow Horses has consistently 6 episodes.