Meet The Cast Of "Slow Horses" And Where You've Seen Them All Before

Casey Rackham
·3-min read

First off, if you aren't watching Slow Horses on Apple TV+...well then you better get streaming!

the members of Slough House
Apple TV+

Slow Horses is a darkly funny espionage drama that follows a team of British intelligence agents who serve in an off-the-books department of MI5 — called Slough House — due to their career-ending mistakes.

Two older adults in a dimly lit office, with one person reclining with feet on the desk and the other sitting beside a pile of papers. They appear to be deep in thought
Apple TV+

If you're new to the show or just looking to get started, here's the Season 4 cast as well as the other TV shows and movies you might have seen the actors in before:

First up, the show stars Gary Oldman as Jackson Lamb, the brilliant but unsociable leader of the spies:

Gary Oldman, wearing a suit with an open collar shirt and glasses, standing in an urban alleyway background
Apple TV+

You probably know him as Sirius Black in the Harry Potter series or as Winston Churchill in Darkest Hour:

Gary Oldman as Sirius Black, wearing a velvet jacket, sits at a table holding a drink, with other people's blurred figures in the foreground
Gary Oldman as Sirius Black, wearing a velvet jacket, sits at a table holding a drink, with other people's blurred figures in the foreground
Gary Oldman portrays Winston Churchill in a period film scene, dressed in a dark suit with a bow tie and round glasses. An unnamed actor stands behind him
Gary Oldman portrays Winston Churchill in a period film scene, dressed in a dark suit with a bow tie and round glasses. An unnamed actor stands behind him

Warner Bros/Courtesy Everett Collection, Focus Features / Courtesy Everett Collection

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Jack Lowden plays River Cartwright, who is pulled into a conspiracy alongside his grandfather:

Jack Lowden in a still from a TV show, wearing a dark jacket and looking serious, with a wooden cabinet and kitchen items in the background
Apple TV+

You might know him from Dunkirk or the BBC miniseries War & Peace:

Jack Lowden as Collins in a scene from the movie
Jack Lowden as Collins in a scene from the movie
A man in period costume with a white cravat and dark coat sits in front of wooden doors
A man in period costume with a white cravat and dark coat sits in front of wooden doors

Warner Bros. / Via youtube.com, BBC / Via youtube.com

Jonathan Pryce plays David Cartwright, River's grandfather and a retired MI5 officer:

An elderly man in a coat sits in a chair, holding a cane, with a serious expression. A modern painting and vases are in the background
Apple TV+

You might know him from Pirates of the Caribbean: The Curse of the Black Pearl or Game of Thrones:

Several men dressed in historical 18th-century attire, including elaborate jackets and wigs, hold muskets
Buena Vista Pictures/Courtesy Everett Collection

Kristin Scott Thomas plays Diana Taverner, the second desk at MI5:

Kristin Scott Thomas sits pensively at a modern office desk with minimalistic decor and a geometric ceiling above her
Apple TV+

You might know her from Four Weddings and a Funeral orThe English Patient:

Hugh Grant and Kristin Scott Thomas in elegant, vintage-style attire, attending an outdoor event surrounded by a crowd
Hugh Grant and Kristin Scott Thomas in elegant, vintage-style attire, attending an outdoor event surrounded by a crowd
Kristin Scott Thomas stands outdoors wearing a buttoned-up white shirt and a light jacket. She has wavy hair and a neutral expression
Kristin Scott Thomas stands outdoors wearing a buttoned-up white shirt and a light jacket. She has wavy hair and a neutral expression

GramercyPictures / Courtesy Everett Collection, Miramax / Everett Collection

Hugo Weaving plays Frank Harkness, a former CIA operative and one of the big bads of Season 4:

Hugo Weaving stands in front of a partly open shuttered window, wearing a green jacket and a serious expression
Apple TV+

You might know him from The Lord of the Rings: The Fellowship of the Ring or The Matrix:

Hugo Weaving as Elrond in
Hugo Weaving as Elrond in
Keanu Reeves (Neo) and Hugo Weaving (Agent Smith) in a fight scene from
Keanu Reeves (Neo) and Hugo Weaving (Agent Smith) in a fight scene from

Warner Bros/Courtesy Everett Collection

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Rosalind Eleazar plays Louisa Guy, a member of Slough House:

Woman with curly hair talking on phone on sidewalk, looking concerned. Other pedestrians with a dog in the background. Scene from TV show
Apple TV+

You might recognize her from Harlots:

Rosalind Eleazar and Holli Dempsey in period costumes stand by a brick wall; a man beside them tends to vegetables in baskets
Hulu / Courtesy Everett Collection

Saskia Reeves plays Catherine Standish, the former secretary at Slough House:

An older woman with grey hair stands in a doorway wearing a buttoned cardigan and patterned top, looking contemplative
Apple TV+

You might recognize her from the Dune TV series or Luther:

Characters in spacesuits with breathing apparatus in a desert-like environment from a sci-fi TV series
Zdenek Vavra / New Amsterdam Entertainment / Courtesy Everett Collection

Aimee-Ffion Edwards plays Shirley Dander, a member of Slough House:

Aimee-Ffion Edwards in a scene from a TV show, wearing a striped sweater, appears wet and holds a towel in an indoor setting with festive decorations in the background
Apple TV+

You might recognize her from the Four Weddings and a Funeral TV series or Peaky Blinders:

two people in a hallway, holding notebooks and a mug. Jackson White is carrying books and a bag
two people in a hallway, holding notebooks and a mug. Jackson White is carrying books and a bag
A woman with long hair and a scarf looks determined while standing outdoors in a natural setting
A woman with long hair and a scarf looks determined while standing outdoors in a natural setting

Jay Maidment / Hulu / Everett Collection, BBC / Via youtube.com

Kadiff Kirwan plays Marcus Longridge, a member of Slough House:

A man in a gray shirt with short, twisted hair sits in an office, with a focused expression on his face
Apple TV+

You might recognize him from Chewing Gum:

Two men arm wrestling at a party, while three friends cheer them on in the background
Channel Four/Courtesy Everett Collection

Christopher Chung plays Roddy Ho, a member of Slough House:

Person in a fast-food restaurant talking on a phone, with Chickado items on the table including trays, food, and a large paper bag
Apple TV+

You might recognize him from Neighbors or Waterloo Road:

A man is smiling while posing for a photo at an event. He is wearing a sequined jacket over a black shirt. A wall with Apple TV+ logos is in the background
Variety / Variety via Getty Images

Joanna Scanlan plays Moira Tregorian, the new secretary at Slough House:

A woman with curly hair, wearing a dark shirt and holding a folder, stands in a dimly lit hallway with a concerned expression
Apple TV+

You might recognize her from Wicked Little Letters or Getting On:

Anjana Vasan, Joanna Scanlan
Parisa Taghizadeh / Sony Pictures Classics / Courtesy Everett Collection

Tom Brooke plays J.K. Coe, a new member of Slough House:

Person in a hooded jacket sitting at a desk, with filing cabinets in the background. The hood obscures part of their face
Apple TV+

You might recognize him from Pirate Radio and Preacher:

A person dressed in a fluffy white bunny costume with large ears and a serious expression, likely in a comedic or playful setting
A person dressed in a fluffy white bunny costume with large ears and a serious expression, likely in a comedic or playful setting
Two characters from TV show
Two characters from TV show

Focus Features/Courtesy Everett Collection, Skip Bolen / AMC / Everett Collection

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Ruth Bradley plays Emma Flyte, the new leader of the Dogs:

ruth bradley at a train station in slow horses
Apple TV+

You might recognize her from Ted Lasso or Guilt

ruth bradley sits in a classroom and appears to be engaged in a conversation with a person who is off-frame
Apple TV+

And finally James Callis plays Claude Whelan, the new First Desk at MI5:

A man in a business suit with a serious expression stands in front of a background filled with files and documents
Apple TV+

You might recognize him from Bridget Jones's Diary:

Renée Zellweger, Shirley Henderson, Sally Phillips, and James Callis in a scene from a movie
Miramax / Courtesy Everett Collection

Season 4 of Slow Horses is currently airing on Apple TV+.

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