Season 1

6 Episodes

Air Date: 2022-03-31

Season 2

6 Episodes

Air Date: 2022-12-01

Long-buried Cold War secrets emerge which threaten to bring carnage to the streets of London. When a liaison with Russian villains takes a fatal turn, our hapless heroes must overcome their individual failings and raise their spy game in a race to prevent a catastrophic incident.

Season 3

6 Episodes

Air Date: 2023-11-28

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.

Season 4

6 Episodes

Air Date: 2024-09-04

In season 4, a bombing detonates personal secrets, rocking Slough House's already unstable foundations.