Olivia Cooke Makes a Surprise Return in the Trailer for Slow Horses Season 6

Apple TV released the first trailer for Season 6 of its spy series Slow Horses, and tacked on the very end was the shocking (I gasped) return of Sidonie Baker, played by House of the Dragon ’s Olivia Cooke. Cooke had a short-lived but beloved stint as Sid during Slow Horses’ premiere season in April…