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Season guide

Slow Horses: Season 3

6 episodes Premiered Nov 29, 2023 Updated Oct 1, 2026

In the third season of the espionage series Slow Horses, the narrative arc begins with a romantic liaison in Istanbul that serves as the catalyst for a broader crisis. This event threatens to expose a deeply buried secret within the ranks of MI5 in London. As the situation escalates, Jackson Lamb and his team of misfits, who are stationed at Slough House, find themselves forcibly drawn into the conflict. The team mus

Previously on Slow Horses

Season 3 Lore Primer

Key plot threads, lore context, and character stakes you need to remember before diving into this season.

  • ⚡ The series follows a dysfunctional team of MI5 agents who are relegated to a department known as Slough House.
  • ⚡ The team is led by a notorious and obnoxious boss named Jackson Lamb.
  • ⚡ The agents operate within the world of espionage, navigating smoke and mirrors to defend England from various forces.
  • ⚡ The show is a spy thriller adapted from the Slough House novels written by Mick Herron.
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Season overview

In the third season of the espionage series Slow Horses, the narrative arc begins with a romantic liaison in Istanbul that serves as the catalyst for a broader crisis. This event threatens to expose a deeply buried secret within the ranks of MI5 in London. As the situation escalates, Jackson Lamb and his team of misfits, who are stationed at Slough House, find themselves forcibly drawn into the conflict. The team must navigate a complex and dangerous conspiracy that places them at the center of a struggle for survival. The stakes of this investigation extend far beyond the immediate safety of the agents at Slough House, as the unfolding events pose a direct threat to the future and stability of MI5 itself. As the team confronts these sinister forces, they must utilize their skills to defend England while dealing with the fallout of the exposed secret. The season chronicles their efforts to survive the conspiracy while operating within the high-pressure environment of the British intelligence community, ultimately determining the fate of the organization they serve.

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Season 3 Episodes

Episode Guide

🛡️ SPOILER SHIELD

Season 3 Progress Shield

Future titles & synopses blurred. Tap "Reveal" on any card to peek.
Binge Efficiency Engine

Season 3: Filler vs. Essential Canon

Filter episodes by narrative weight. Focus on essential mytharc and skip standalone side quests.

50%
50%
Mytharc (3): Crucial lore & season climaxes
Core (3): Character development & subplots
Side Quest (0): Standalone / filler
S3·E1 Mytharc

Strange Games

Nov 29, 2023 · 44 min

A romantic relationship in Istanbul ends badly. Lamb hits the panic button when one of his Slow Horses fails to show up for work.

S3·E2 Core

Hard Lessons

Nov 29, 2023 · 44 min

River has to steal something out of the Park to save a life. Lamb realizes a stranger game is afoot.

S3·E3 Core

Negotiating with Tigers

Dec 6, 2023 · 45 min

Marcus and Shirley face Lamb's wrath. River discovers revenge is a dish best served cold.

S3·E4 Core

Uninvited Guests

Dec 13, 2023 · 47 min

Tearney makes a bold move. The Slow Horses assist the Tiger Team, unaware of their hidden agenda. Lamb and Ho take a road trip.

S3·E5 Mytharc

Cleaning Up

Dec 20, 2023 · 42 min

Taverner and Tearney face off for control of MI5. River and Louisa find themselves caught in the crossfire.

S3·E6 Mytharc

Footprints

Dec 27, 2023 · 45 min

The Slow Horses fight for their lives. Lamb shares some devastating truths with Catherine.

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