Slow Horses: Season 4

6 episodes Premiered Sep 4, 2024 Updated Sep 22, 2026

Slow Horses Season 4 continues the overarching saga across 6 episodes.

Previously on Slow Horses

Season 4 Lore Primer

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

⚡ Picks up essential narrative continuity directly following the events of Slow Horses Season 3.
⚡ Character alliances, factions, and personal loyalties undergo significant shifts under escalating stakes.
⚡ Addresses unresolved cliffhangers and thematic mysteries introduced during previous seasons.
⚡ Establishes the primary seasonal conflict that drives serialized character arcs toward the finale.

Slow Horses Season 4 continues the overarching saga across 6 episodes.

Season 4 Episodes

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Binge Efficiency Engine

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

50%

Mytharc (3): Crucial lore & season climaxes

Core (3): Character development & subplots

Side Quest (0): Standalone / filler

S4·E1 Mytharc

Sep 4, 2024

A London bombing puts Taverner under pressure. When River grows concerned for his grandfather, Louisa encourages him to go for a visit.

S4·E2 Core

Sep 11, 2024

A naive agent makes a discovery about the Westacres bomber. Lamb suspects that David knows more than he's letting on.

S4·E3 Core

Sep 18, 2024

River is trapped in France. Back at Slough House, the Dogs have come for Lamb.

S4·E4 Core

Sep 25, 2024

Taverner is desperate to hide dangerous secrets. River seeks answers at his grandfather's house.

S4·E5 Mytharc

Oct 2, 2024

Lamb questions David about France as River comes face to face with the enemy.

S4·E6 Mytharc

Oct 9, 2024

Impossible decisions are faced and sacrifices are made.