"Slow Horses" is a British spy thriller series that delves into the lives of MI5 agents relegated to Slough House, a department for operatives who have fallen from grace. Led by the unorthodox and sardonic Jackson Lamb, portrayed by Gary Oldman, the team navigates a world of espionage filled with dark humor and unexpected twists. The series has been praised for its sharp writing and compelling performances, with Oldman ranking his role as one of his career favorites.