A Discovery of Witches Thursday, Jan. 17 | Sundance Now and Shudder Like True Blood with a PhD, another acclaimed supernatural trilogy (by Deborah Harkness) comes to TV, starring Downton Abbey’s elegant Matthew Goode as a scholarly ancient vampire drawn to historian and reluctant witch Diana Bishop (Teresa Palmer) after she unearths a long-sought-after “Book of Life” coveted by all occult species. Diana doesn’t know her own powers, but now that she’s a target of sinister forces, she’ll have to learn.