Slow Horses Season 6 Episode 4 photos preview “Lost and Found,” arriving Wednesday, October 7, on Apple TV. Olivia Cooke’s Sid Baker is back in the middle of the danger alongside River Cartwright and J.K. Coe as the three try to evade the hit squad pursuing them.
Gary Oldman returns as Jackson Lamb, who is trying to determine who Frank is working for. Jack Lowden plays River, whose reunion with Sid has given the season an urgent new thread: they have barely had time to talk before finding themselves on the run together.
For the events leading into this episode, read our Season 6 Episode 3 recap and ending explained. That recap contains full spoilers for “Resurrection.” You can also revisit the Episode 3 photos.
Slow Horses Season 6 Episode 4 Synopsis
Lamb tries to figure out who Frank is working for. Sid, River and Coe do everything they can to evade the hit squad.
When Does Slow Horses Season 6 Episode 4 Premiere?
“Lost and Found” premieres Wednesday, October 7, 2026, on Apple TV. Earlier Season 6 episodes are available to stream now. See the official episode page for details.
Follow Seat42F’s Slow Horses coverage for episode photos, recaps, reviews, trailers and series news.
Slow Horses Season 6 Episode 4 Photos: “Lost and Found”
Take a look at the new episode photos below.
Thomas Miller is the founder and Editor-in-Chief of Seat42F, covering television, movies and streaming entertainment. He launched Seat42F in 2007 and has spent nearly two decades covering the entertainment industry.
