Apple TV Sets Slow Horses Season 6 for Sept. 16, Adding BAFTA Winner Lenny Rush

Q: How will 17-year-old BAFTA winner Lenny Rush's character challenge the veteran spies of Slough House in its 'darkest' season yet?

It has not been revealed how Lenny Rush’s character will challenge Slough House, because Apple TV+ is keeping the role under wraps. What is known is that Rush, the 17-year-old BAFTA winner from *Am I Being Unreasonable?*, joins Season 6 as a significant newcomer in what Gary Oldman has described as the show’s “dark season.” The new run adapts Mick Herron’s *Joe Country* and *Slough House* and places Jackson Lamb’s disgraced MI5 team in a “fatally high-stakes game of retaliation and revenge,” with the agents forced to go on the run. That context suggests any new character could become a serious pressure point for the veteran spies, whether as an ally, a disruptive outsider, or part of the wider MI5 power struggle around Diana Taverner. But no official synopsis, casting note, or production detail has yet identified Rush’s character name, function, or direct connection to Lamb’s team. So the clearest answer is that the challenge he poses remains a closely guarded secret. What can be said is that his arrival adds another unpredictable element to a season already framed as the series’ bleakest and most dangerous chapter yet.

3 articles · Updated · Deadline · Jun 11

September 16 is the launch date for "Slow Horses" Season 6, with Apple TV saying the opener will be followed by weekly episodes through October 21.
Lenny Rush joins the cast in an undisclosed role as the new season sends the Slough House team on the run in a retaliation-and-revenge plot tied to Diana Taverner.
Season 6 adapts Mick Herron’s sixth and seventh Slough House books — "Joe Country" and "Slough House" — with Gary Oldman returning as Jackson Lamb and Adam Randall directing.
A seventh season is already in the works at Apple TV, set to adapt Herron’s eighth book, "Bad Actors," underscoring the spy drama’s status as one of the streamer’s biggest hits.