File:This Changes Everything - A Discovery of Witches - Sundays at 9pm - BBC America

On the next A Discovery of Witches, Gillian pays a price for her disloyalty to Diana. The vampires study witch DNA. The fall-out threatens the fragile equilibrium between creatures and the focus is to end Matthew and Diana's relationship at any cost.

New episodes of #ADiscoveryofWitches premiere Sundays at 9pm on BBC America, after new episodes of #KillingEve.

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