‘Slow Horses’ Actor Jack Lowden Unpacks River Cartwright and Why Pride Gets in His Way

It’s fair to say that when audiences see River Cartwright at the beginning of Apple TV’s “Slow Horses” Season 5, he is not in a good place. The previous season revealed that River’s father, Frank Harkness (Hugo Weaving), is both a sociopath and the leader of a network of trained assassins. It was also revealed […]