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.
All episodes — Season 3
S3 E1Strange Games
Nov 29, 20237.947 min
A romantic relationship in Istanbul ends badly. Lamb hits the panic button when one of his Slow Horses fails to show up for work.
S3 E2Hard Lessons
Nov 29, 20238.144 min
River has to steal something out of the Park to save a life. Lamb realizes a stranger game is afoot.
S3 E3Negotiating with Tigers
Dec 6, 20238.247 min
Marcus and Shirley face Lamb's wrath. River discovers revenge is a dish best served cold.
S3 E4Uninvited Guests
Dec 13, 20238.248 min
Tearney makes a bold move. The Slow Horses assist the Tiger Team, unaware of their hidden agenda. Lamb and Ho take a road trip.
S3 E5Cleaning Up
Dec 20, 20238.444 min
Taverner and Tearney face off for control of MI5. River and Louisa find themselves caught in the crossfire.
S3 E6Footprints
Dec 27, 20238.548 min
The Slow Horses fight for their lives. Lamb shares some devastating truths with Catherine.