Follows a team of British intelligence agents who serve as a dumping ground department of MI5 due to their career-ending mistakes.
Cast:Gary Oldman , Jack Lowden , Kristin Scott Thomas , Saskia Reeves , Chris Reilly , Rosalind Eleazar , Christopher Chung , Aimee-Ffion Edwards , Kadiff Kirwan , Dustin Demri-Burns , Freddie Fox , Sophie Okonedo , Samuel West , Antonio Aakeel , Bally Gill , Jonathan Pryce , Sope Dirisu , David Walmsley
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.
Lamb liaises with a Russian defector who may hold a clue to sleeper agents. River is on the trail of a ruthless assassin.
River gets cozy in the Cotswolds while searching for a sleeper agent. Min discovers Russian drinking games are the most brutal of all.
Louisa makes her move on Pashkin. Catherine makes moves of a different kind when she plays high-stakes chess with a sinister stranger.
Lamb orders his Slow Horses to walk into traps. River believes something alarming is heading toward London.
Lamb and Katinsky go head to head. Ho finds himself trapped on a train with a Russian assassin.