‘Slow Horses’ Season 6 review: Another impeccable season of Britain’s finest caught with its trousers down

The sixth season of Apple TV's 'Slow Horses' continues the saga of MI5's disgraced agents as they face a mysterious conspiracy targeting former members of Slough House. While the team navigates personal grief and professional peril, Jackson Lamb and River Cartwright must uncover why their discarded colleagues are being systematically eliminated.
Why it matters
As a critically acclaimed series, 'Slow Horses' represents a benchmark for high-quality espionage television, showcasing how long-running character-driven dramas maintain narrative momentum and critical relevance.
No collection of blundering intelligence operatives on television is quite as magnificently useless as the residents of Slough House. Over five seasons, Jackson Lamb, River Cartwright and the rest of MI5’s human refuse pile have survived bombings, kidnappings, botched extractions, terrorist plots, Russian skulduggery, rogue agents, internal coups, political cover-ups, and an array of other catastrophically bad professional judgements. Yet here we are again, six seasons into Apple TV’s glorious, grubby espionage comedy, and almost nothing has changed (complimentary). Slough House is still populated by its spectacular clown car of disgraced spies, except the bodies turning up around them this season suggest their latest disaster might actually have nothing to do with their own incompetence. For once, somebody other than the Slow Horses may be trying to kill the Slow Horses.
Get smarter about the news
Sign up free for a feed built around what you actually care about, Dive Deeper research on any story, and the full text of every article.
Create free accountAlready have an account? Sign in