Slow Horses
Season 4
6 episodes
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S04E01 Identity Theft
A London bombing puts Taverner under pressure. When River grows concerned for his grandfather, Louisa encourages him to go for a visit.
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S04E02 A Stranger Comes to Town
A naive agent makes a discovery about the Westacres bomber. Lamb suspects that David knows more than he's letting on.
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S04E03 Penny for Your Thoughts
River is trapped in France. Back at Slough House, the Dogs have come for Lamb.
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S04E04 Returns
Taverner is desperate to hide dangerous secrets. River seeks answers at his grandfather's house.
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S04E05 Grave Danger
Lamb questions David about France as River comes face to face with the enemy.
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S04E06 Hello Goodbye
Season finale. Impossible decisions are faced and sacrifices are made.
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