It’s hardly been 24 hours since the Season 5 premiere of Slow Horses on Apple TV+, and one star has just shared his thoughts on the franchise’s potential future. Headlining Slow Horses as Jackson Lamb and River Cartwright are Gary Oldman and Jack Lowden, but the show has seen plenty of other stars come and go over the years. One of the biggest players in the series is Jonathan Pryce, the Oscar nominee for his work on The Two Popes, who plays David Cartwright, retired MI5 spy and grandfather of Lowden’s River Cartwright.