EXCLUSIVE: The BBC and BritBox’s Poirot series Hercule has unveiled more cast including Katherine Parkinson (Rivals), Omari Douglas (Black Doves) and Toby Stephens (Jane Eyre).

As with previous cast releases, the trio’s roles are being kept under wraps, but they come as the BBC and BritBox reveal the second book to be adapted for Mammoth Screen’s TV show will be Agatha Christie’s Peril at End House, following Lord Edgware Dies. The third novel the show will be part-based on is still to be revealed.

Other new cast include Jessica Alexander (The Beauty), Honor Swinton Byrne (The Souvenir), Paul Forman (Emily in Paris), Arthur Hughes (Shardlake), Ralf Little (Death in Paradise), River Medway (RuPaul’s Drag Race UK) and Natalie Quarry (Call the Midwife).

Deadline revealed earlier this year that Hercule was in the works and Edward Bluemel is playing the lead. The six-episode show is billed as “an intimate study of Hercule Poirot” while introducing the world’s greatest fictional detective to “future friends, allies and one particular nemesis.” Intrigue surrounds who will play which roles, and the identity of the nemesis. Peril at End House features Christie fan favorites like Arthur Hustings and Chief Inspector Japp and is set in Cornwall, where Poirot and Hastings meet a young woman who is persuaded that someone is out to kill her.

The show is currently filming in Liverpool and comes as Christie adaptations continue to rate, with Netflix’s Agatha Christie’s Seven Dials recently drawing in big audiences.

Written by Benji Walters (Code of Silence), the first two episodes are being directed by Jonny Campbell (Am I Being Unreasonable?), with Chanya Button (Code of Silence) and Alrick Riley (Bridgerton) directing the second two episodes and the final two episodes respectively. The executive producers are Walters and Campbell, James Prichard for Agatha Christie Limited, Rebecca Durbin and Damien Timmer for Mammoth Screen, Nick Lambon for the BBC, and Robert Schildhouse, Jon Farrar, and Stephen Nye for BritBox. Charlie Palmer (A Woman Of Substance) serves as series producer. Fifth Season is handling global distribution.

Sean Teale (Doctor Odyssey, Only Murders in the Building), Sarah Jeffery (The Six Triple Eight, Charmed), Megan Stott (Penelope, Little Fires Everywhere), Lili Simmons (Double Down South, Power Book IV: Force), Anthony Keyvan (Just Picture It, XO, Kitty) and JoBeth Williams (Poltergeist, Behemoth!) have joined the cast of Things We Never Got Over, Prime Video‘s series adaptation of Lucy Score’s bestselling novel of the same name. They join previously announced leads Molly Griggs, Matthew Noszka and Tommy Martinez.

Things We Never Got Over, from Ringer creators Eric Charmelo and Nicole Snyder, follows runaway bride Naomi Witt (Griggs), who arrives in the quirky town of Knockemout, Virginia; she expects to rescue her estranged twin (Griggs) and return to the life she left behind. Instead, her sister disappears, leaving Naomi with a niece she never knew existed, a town full of irresistible characters — including charming local sheriff Nash Morgan (Martinez) and his decidedly grumpy but infuriatingly sexy brother Knox Morgan (Noszka) — and a future she never imagined.

Teale will play Lucian; Jeffery will portray Sloane; Stott is Waylay; Simmons will play Lina; Keyvan will portray Stef and Williams is Liza J.

The first book in Score’s Knockemout trilogy, Things We Never Got Over, is a New York Times bestseller and one of the most-read titles on Kindle Unlimited since its release in 2022, with sequels completing the trilogy in 2023.

Charmelo and Snyder wrote the pilot for the upcoming series adaptation and will serve as co-showrunners and executive producers. Gina Girolamo will executive produce through her production company, Strega Stories. Book author Lucy Score will serve as co-executive producer. The series is produced by Amazon MGM Studios.