A romantic liaison in Istanbul threatens to expose a buried MI5 secret in London. When Jackson Lamb and his team of misfits are dragged into the fight, they find themselves caught in a conspiracy that threatens the future not just of Slough House but of MI5 itself.
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Episode 1
Strange Games
A romantic relationship in Istanbul ends badly. Lamb hits the panic button when one of his Slow Horses fails to show up for work.
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Episode 2
Hard Lessons
River has to steal something out of the Park to save a life. Lamb realizes a stranger game is afoot.
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Episode 3
Negotiating with Tigers
Marcus and Shirley face Lamb's wrath. River discovers revenge is a dish best served cold.
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Episode 4
Uninvited Guests
Tearney makes a bold move. The Slow Horses assist the Tiger Team, unaware of their hidden agenda. Lamb and Ho take a road trip.
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Episode 5
Cleaning Up
Taverner and Tearney face off for control of MI5. River and Louisa find themselves caught in the crossfire.
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Episode 6
Footprints
The Slow Horses fight for their lives. Lamb shares some devastating truths with Catherine.