'Slow Horses' Season 6 Just Premiered — And Gary Oldman's Jackson Lamb Might Be Heading for His Final Mission

Apple TV+'s Crown Jewel Returns With Higher Stakes Than Ever

Slow Horses Season 6 officially premiered on Apple TV+ on September 16, 2026, and if early reviews are any indication, this might be the best season yet — and possibly the beginning of the end for Gary Oldman's iconic Jackson Lamb. The critically acclaimed spy thriller, based on Mick Herron's Slough House novels, has been one of Apple TV+'s most consistent hits, and Season 6 raises the stakes to new heights.

For the uninitiated, Slow Horses follows a group of disgraced MI5 agents — the "slow horses" — who've been banished to Slough House, a bureaucratic dumping ground run by the brilliantly disheveled Jackson Lamb. Despite being considered washouts, they keep stumbling into (and occasionally solving) major intelligence crises. Think John le Carré meets dark comedy, with Gary Oldman delivering the most entertainingly miserable performance on television.

Season 6: What We Know

The new season continues adapting Herron's novels, with the Slough House team facing threats that feel uncomfortably close to home. Returning alongside Oldman are series regulars Kristin Scott Thomas as the ruthless MI5 chief Diana Taverner, Jack Lowden as River Cartwright, and Saskia Reeves as Catherine Standish. New addition Olivia Cooke joins the cast this season, adding fresh energy to the ensemble.

The first two episodes dropped on premiere night, with subsequent episodes releasing weekly. Critics who've seen advance screeners have praised the season's tighter plotting and what many describe as Oldman's "most emotionally exposed" performance as Lamb — hinting that the character may finally be confronting his past in ways he's spent years avoiding.

Is This the Final Season? Not Quite

Here's the good news for fans worried about the show ending: Apple TV+ has already renewed Slow Horses for Season 8, confirming that Jackson Lamb's story isn't over yet. The show has become Apple's quiet critical darling — it may not generate the mainstream buzz of Severance or Ted Lasso, but it consistently ranks among the most acclaimed series on any platform.

With six seasons of masterful spy craft, razor-sharp writing, and Gary Oldman absolutely devouring every scene, Slow Horses remains the best show you're probably not watching. If you haven't started yet, there's never been a better time. Season 6 is streaming now on Apple TV+, and trust us — Jackson Lamb would want you to binge it. Well, he'd probably just insult you and crack open a beer, but same energy.