Slow Horses just dropped its Season 5 finale, and the Apple TV adaptation of Mick Herron’s Slough House book series will be back for two more seasons. The sixth season of Slow Horses has already been ...

Apple TV’s Emmy-winning spy thriller “Slow Horses” is gathering its reins for a sixth season, and it’s further ahead than most people think. In fact, “Slow Horses” Season 6 has already been filmed.