A Look at Slow Horses Season 6 Cast: Emmy-Winning Series Brings Back Gary Oldman and More

Sir Gary Oldman is, of course, returning for Season 6 as Jackson Lamb. Apple TV describes Lamb as the “brilliant but cantankerous leader of the spies who end up in Slough House due to their career-ending mistakes and who frequently find themselves blundering around the smoke and mirrors of the espionage world.” Oldman is best known for his roles in Léon: The Professional, Darkest Hour, The Fifth Element, The Dark Knight, and the Harry Potter films.

In Slow Horses, Jack Lowden plays River Cartwright, an ambitious yet luckless MI5 field agent who has been exiled to Slough House. He is confirmed to return for Season 6. Meanwhile, Lowden is known for his roles in Pride and Prejudice, Mary Queen of Scots, Dunkirk, Calibre, The Gold, Benediction, and Tommy’s Honour, among other projects.

Kristin Scott Thomas is also back as Diana Taverner in Season 6. As per the logline, “River Cartwright (Jack Lowden) had hoped to escape the purgatory of Slough House, after the glimmering hope of a promotion seemed just in his grasp. But the endless machinations of newly-ascended First Desk Diana Taverner land Cartwright back on MI5’s island of misfit toys, under the reluctant governance of Jackson Lamb (Gary Oldman).” Uh oh! Scott Thomas is widely recognized for her roles in The English Patient, Four Weddings and a Funeral, My Mother’s Wedding, The Horse Whisperer, and My Old Lady.

Saskia Reeves is also not going anywhere. In Season 6, she returns as Catherine Standish, the loyal office administrator and recovering alcoholic at Slough House. Reeves has made a name for herself with roles in Close My Eyes, Butterfly Kiss, The Outrun, Us, Shadows, The Child in Time, and Island at War, among other projects.

Rosalind Eleazar stars as Louisa Guy, a sharp and capable MI5 agent banished to the administrative dumping ground of Slough House. Slow Horses fans will be seeing more of her in the soon-to-be-released Season 6. Eleazar’s previous work includes Missing You, Misty Green, Deep Water, Uncle Vanya, Rose of Nevada, and Howards End, among other projects.

And yes, Christopher Chung is also returning to reprise his role as Roddy Ho, an arrogant, tech-savvy hacker who considers himself a genius. The official logline has a little mention of his character. It reads, “After the chaos of last season’s entanglement with Libyan operatives, accidental assassinations, and Roddy’s love life, the Horses could use a breather. But as River deals with personal matters, spurring the return of ruthless mercenary — and River’s father — Frank Harkness (Hugo Weaving), another maelstrom of revenge and retaliation for old wounds begins to form.” Chung’s notable credits include My Brilliant Career, Gods of Their Own Religion, Bus Girl, Blitz, West Side Stories, and Sandwich Man.