Salva, the name of the illicit substance that the girls take during the first episode of the series, may take its name from Salvia, an herbal plant with supposed hallucinatory properties.
The actress who plays Abigail is Ashley Nicole Williams. One of the first young girls to make accusations during the Salem witch hysteria was Abigail Williams. She was also a main character in Arthur Miller's fictionalized version of the events, "The Crucible."