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Last Stop

Episode number: 1

Overview: Jackson Lamb is on high alert after a former spy is found dead. Min and Louisa are tempted by an offer from outside Slough House.

From Upshott with Love

Episode number: 2

Overview: Lamb liaises with a Russian defector who may hold a clue to sleeper agents. River is on the trail of a ruthless assassin.

Drinking Games

Episode number: 3

Overview: River gets cozy in the Cotswolds while searching for a sleeper agent. Min discovers Russian drinking games are the most brutal of all.

Cicada

Episode number: 4

Overview: Louisa makes her move on Pashkin. Catherine makes moves of a different kind when she plays high-stakes chess with a sinister stranger.

Boardroom Politics

Episode number: 5

Overview: Lamb orders his Slow Horses to walk into traps. River believes something alarming is heading toward London.

Old Scores

Episode number: 6

Overview: Lamb and Katinsky go head-to-head. Ho finds himself trapped on a train with a Russian assassin.