Apple TV+’s Slow Horses is an adaptation based on a book series by Award-winning author Mick Herron. Season 4, which is currently streaming in its entirety, is taken right from the fourth book of the series. The show follows a team of British intelligence agents who serve in a dumping ground department of MI5, called Slough House. Gary Oldman stars as Jackson Lamb, the brilliant but irascible leader of the spies who end up in Slough House due to their career-ending mistakes.
