Slow Horses: Season 5 (2025): Spies Outcast, Enemies Within

Old secrets don't die—they wait patiently in the dark until someone leaks them.

Slow Horses: Season 5 continues the acclaimed Apple TV+ espionage thriller with its signature blend of dry British wit, gritty realism, and razor-sharp political intrigue. As the misfit agents of Slough House return, they're more jaded, more bitter—and more indispensable than ever.

This season picks up in the aftermath of Season 4’s explosive finale. With MI5 leadership shaken and public trust eroding, Jackson Lamb (Gary Oldman) is dragged back into the spotlight—kicking, swearing, and chain-smoking all the way. But when a whistleblower dies under suspicious circumstances and a Cold War-era mole resurfaces, Lamb and his team find themselves navigating a dangerous maze of double agents, encrypted dossiers, and ghosts of British intelligence.

Meanwhile, River Cartwright struggles with loyalty to an agency that sees him as disposable, while Catherine Standish uncovers a hidden network of betrayal buried deep within MI5’s archives. As political tensions rise and a cyber-attack threatens to expose the nation’s deepest secrets, the slow horses must act—fast.

Season 5 leans heavily into the psychological weight of betrayal and the moral gray zones of intelligence work. The writing is as sharp as ever, with whip-smart dialogue and layered performances. It's less about chasing villains and more about understanding the cost of being in the shadows for too long.

As usual, the glory will go to someone else. But if Britain is to survive what’s coming, it may just need the screw-ups of Slough House more than ever.