New on PBS Prime Video in September 2026: ‘Marble Hall Murders’ and More

Prime Video is a great platform if you like YA shows like Sterling Point or action series like Reacher, but it’s also a great place to watch programming from all corners of the streaming landscape.

That includes PBS, which continues its decades-long tradition of airing some of the best shows, films and specials around.

Watch With Us is proud to spotlight PBS on Prime Video’s September 2026 programming, which includes the return of fan-favorite series like Magpie Murders (titled Marble Hall Murders this season) as well as fascinating docuseries like The Story of Cats.

Keep reading to find out all of what PBS on Prime Video has to offer this month.

PBS on Prime Video September Programming Highlights

‘Marble Hall Murders’ (‘Magpie Murders’ Season 3) — Now Available

Susan Ryeland is thrown back into the world of Atticus Pünd when she reluctantly begins a new novel. The great detective investigates a fiendish crime in Corfu in 1955, but Susan has her own mystery to solve in the present day with the monstrous Crace family. Hidden secrets come to light and more than one death looms as Susan and Pünd are once again faced with a terrible puzzle.

‘The Marlow Murder Club’ Season 3 (Now Available)

Now a key part of DI Tanika Malik’s crime-solving team, Judith Potts, Suzie Harris and Becks Starling are back and bringing their unconventional methods to a string of high-profile murders.

‘Rosie’s Rules’ Volume 13 (September 14)

Rosie enters the cowgirl contest at the rodeo and learns what it means to be a true cowgirl. Papá and Tía have a contest to see who makes the best tamales. Rosie wants to be Mayor for the day. Rosie decides to become a statue; Rosie and Crystal host a doggy wash; Rosie and Javi try to avoid a pirate ghost and more!

‘Trespasses’ Season 1 (September 20)

Cushla is a young Catholic schoolteacher whose life in 1975 Northern Ireland is shadowed by the Troubles. She meets and falls for Michael—an older, married Protestant barrister. Their affair is intoxicating and dangerous. As the forbidden love between Cushla and Michael deepens, violence looms and tensions rise. Cushla is pulled between duty and desire, family and freedom.