Premiering 17 September, the series will see the return of Gillian Anderson, Asa Butterfield, Ncuti Gatwa, Emma Mackey, Patricia Allison, Connor Swindells, Kedar Williams-Stirling, Mimi Keene, Aimee Lou Wood, Chaneil Kular, Simone Ashley and Tanya Reynolds.
Deep breath for even more star power: Mikael Persbrandt, Sami Outalbali, Chinenye Ezeudu, Anne-Marie Duff, Jim Howick, Rakhee Thakrar, James Purefoy, Samantha Spiro, Hannah Waddingham and Sharon Duncan-Brewster.
Season three will also welcome three new cast members. Jemima Kirke has been cast as a character called Hope, who will replace Michael Groff (Alistair Petrie) as Moordale’s new headmistress.