Apple TV+ is gearing up for the return of the critically acclaimed espionage series ‘Slow Horses’ with its fourth season, premiering on September 4th. The season features returning cast members including Gary Oldman as Jackson Lamb, Jack Lowden as River Cartwright, and Kristin Scott Thomas as Diana Taverner, alongside exciting new additions like Ruth Bradley, James Callis, and Hugo Weaving. Based on Mick Heron’s Slough House novels, ‘Slow Horses’ continues to follow the misadventures of a group of MI5 agents who are relegated to Slough House, a purgatory for spies. Season 4 promises more thrilling espionage and compelling characters as the team tackles new cases with their unique brand of unorthodox methods.