What's New on BritBox in September 2026

BritBox is celebrating Agatha Christie's birth in September 2026 with a themed birthday party. The streaming service has designed its fall 2026 programming to revolve around the legendary author and the numerous adaptations of her work. Meanwhile, Peacock is introducing new content for September as the spooky season begins. Both platforms are updating their libraries for the month, with BritBox focusing on the legacy of Christie while Peacock prepares for the upcoming autumn holiday season.