Varada Sethu (The Other Bennet Sister, Andor), Ethan Moorhouse (The Moment, Ludwig), Tuppence Middleton (Downton Abbey: A New Era, Mank), Merab Ninidze (Homeland, The Courier) and BAFTA nominee Joshua McGuire (The Gold, Anatomy of a Scandal) have joined the Season 7 cast of Apple TV‘s Emmy-winning spy drama Slow Horses. They join Gary Oldman and James Callis, who returns as Claude Whelan, in the upcoming season.

Slow Horses follows a dysfunctional team of British intelligence agents who serve in a dumping ground department of MI5 known un-affectionately as Slough House. Oldman stars as Jackson Lamb, the brilliant but cantankerous leader of the spies, who end up in Slough House due to their career-ending mistakes as they frequently find themselves blundering around the smoke and mirrors of the espionage world.

Cast also includes Jack Lowden, Kristin Scott Thomas, Jonathan Pryce, Hugo Weaving, Saskia Reeves, Rosalind Eleazar, Christopher Chung, Aimee-Ffion Edwards, Joanna Scanlan, Tom Brooke, Lucian Msamati, and Olivia Cooke.

Season 7, based on the Bad Actors novel in Mick Herron’s Slough House book series, sees Oldman’s Jackson Lamb and his Slow Horses on the hunt to find and neutralize a mole at the heart of British Government before they can bring down the state.

Slow Horses is produced for Apple TV by See-Saw Films, with Jamie Laurenson, Hakan Kousetta, Iain Canning, Emile Sherman, Dan Hassid, Helen Gregory, Mick Herron, Gail Mutrux, Douglas Urbanski and Oldman serving as executive producers. Season seven is adapted for television and executive produced by Ben Vanstone, with Robert McKillop set to direct. See-Saw Films is part of the Mediawan group.

Sethu, Ninidze and McGuire are repped by the Curtis Brown Group; Moorhouse is repped 42 and Middleton by Conway van Gelder Grant.