The Healer (S05E18)

Two sisters found wrapped in plastic "cocoons" and asphyxiated have Detectives Logan (Chris Noth) and Barek (Annabella Sciorra) questioning one victim's boyfriend who works for Lydia (guest star Sherri Saum), a local nurse suspected of extorting money from patients with voodoo. Logan initially questions Lydia and soon runs afoul of her "powers." As the detectives gather bank transfer documents, they learn from experience how people can live in fear and false hope from Lydia's potent spells. (iTunes)