Apple TV has added several new cast members for the seventh season of its hit series Slow Horses, based on Mick Herron's novel Bad Actors, which is part of his Slough House book series. Season 7 sees Jackson Lamb (Gary Oldman) and his crew "on the hunt to find and neutralize a mole at the heart of British Government before they can bring down the state." Season six of Slow Horses is currently running and season eight was recently announced.
The additional cast members include Varada Sethu (The Other Bennet Sister, Andor, Doctor Who), Ethan Moorhouse (The Moment, Ludwig, Mobland), Tuppence Middleton (Downton Abbey: A New Era, Mank, Death by Lighting), Merab Ninidze (Homeland, The Courier), and Joshua McGuire (The Gold, Anatomy of a Scandal), as well as the return of James Callis.