Since 2022, Kristin Scott Thomas has played the Deputy Director General of MI5, Diana Taverner, in Slow Horses, proving that her brief time on Mission: Impossible should have been expanded much further. Long before Slow Horses, Thomas made a name for herself during the 1980s and 1990s in projects such as Four Weddings and a Funeral, The English Patient, Bitter Moon, and The Horse Whisperer. She has earned notable awards during her career, such as a BAFTA and an Olivier award. Slow Horses is Thomas' most recent television project, and Slow Horses season 4 is set to release in 2024.
https://screenrant.com/slow-horses-kristin-scott-thomas-mission-impossible-role/