When does A Discovery of Witches return?

A Discovery of Witches is a British fantasy television series based on the All Souls Trilogy by Deborah Harkness. It stars Teresa Palmer and Matthew Goode as a witch and a vampire who must learn about and fend off magical creatures. Edward Bluemel, Louise Brealey, Malin Buska, Aiysha Hart, Owen Teale, Alex Kingston, and Valarie Pettiford are also featured. The programme received generally positive reviews, with praise for the chemistry between the main characters, and it received a nomination for Best New Drama at the National Television Awards.
Diana Bishop discovers a bewitched manuscript in Oxford's Bodleian Library. She is offered help by a mysterious geneticist and vampire Matthew Clairmont. Despite a long-held mistrust between witches and vampires, they form an alliance and set out to protect the book.